Bug 1850: LTS Support

Updates base to Ubuntu 20.04
Updates python to 3.8
Updates pip dependencies to more recent versions
Adds apt cache to stage 2 dockerfile
Pin version of regexp to match IM

Fixes bug 1850

Change-Id: Ic9a4a2d32593f1f64f5426c733609787925fe88c
Signed-off-by: beierlm <mark.beierl@canonical.com>
diff --git a/requirements.txt b/requirements.txt
index d8870a3..09bec59 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -1,393 +1,3 @@
-appdirs==1.4.4
-    # via
-    #   openstacksdk
-    #   virtualenv
-argcomplete==1.12.2
-    # via yq
-attrs==20.3.0
-    # via cmd2
-bcrypt==3.2.0
-    # via paramiko
-bitarray==1.8.1
-    # via
-    #   -r requirements.in
-    #   pyangbind
-blessings==1.6
-    # via charm-tools
-certifi==2020.12.5
-    # via requests
-cffi==1.14.5
-    # via
-    #   bcrypt
-    #   cryptography
-    #   pynacl
-chardet==4.0.0
-    # via requests
-charm-tools==2.8.3
-    # via -r requirements.in
-cheetah3==3.2.6.post1
-    # via charm-tools
-cliff==3.7.0
-    # via
-    #   osc-lib
-    #   python-openstackclient
-cmd2==1.5.0
-    # via cliff
-colander==1.7.0
-    # via charm-tools
-colorama==0.4.4
-    # via cmd2
-coverage==5.5
-    # via robotframework-jsonlibrary
-cryptography==3.4.7
-    # via
-    #   openstacksdk
-    #   paramiko
-    #   secretstorage
-debtcollector==2.2.0
-    # via
-    #   oslo.config
-    #   oslo.utils
-    #   python-keystoneclient
-decorator==5.0.6
-    # via
-    #   dogpile.cache
-    #   jsonpath-rw
-    #   openstacksdk
-dict2colander==0.2
-    # via charm-tools
-distlib==0.3.1
-    # via virtualenv
-distro==1.5.0
-    # via lazr.restfulclient
-dogpile.cache==1.1.2
-    # via openstacksdk
-enum34==1.1.10
-    # via pyangbind
-filelock==3.0.12
-    # via virtualenv
-haikunator==2.1.0
-    # via -r requirements.in
-httplib2==0.19.1
-    # via
-    #   launchpadlib
-    #   lazr.restfulclient
-idna==2.10
-    # via requests
-iso8601==0.1.14
-    # via
-    #   colander
-    #   keystoneauth1
-    #   openstacksdk
-    #   oslo.utils
-    #   python-novaclient
-    #   python-openstackclient
-jmespath==0.10.0
-    # via openstacksdk
-jsonpatch==1.32
-    # via openstacksdk
-jsonpath-rw-ext==1.2.2
-    # via robotframework-jsonlibrary
-jsonpath-rw==1.4.0
-    # via
-    #   jsonpath-rw-ext
-    #   robotframework-jsonlibrary
-jsonpointer==2.1
-    # via jsonpatch
-jsonschema==2.5.1
-    # via charm-tools
-jujubundlelib==0.5.6
-    # via
-    #   charm-tools
-    #   theblues
-keyring==20.0.1
-    # via
-    #   charm-tools
-    #   launchpadlib
-keystoneauth1==4.3.1
-    # via
-    #   openstacksdk
-    #   osc-lib
-    #   python-cinderclient
-    #   python-keystoneclient
-    #   python-novaclient
-launchpadlib==1.10.13
-    # via charm-tools
-lazr.restfulclient==0.14.3
-    # via launchpadlib
-lazr.uri==1.0.5
-    # via
-    #   launchpadlib
-    #   wadllib
-libcharmstore==0.0.9
-    # via charm-tools
-lxml==4.6.3
-    # via
-    #   pyang
-    #   pyangbind
-macaroonbakery==1.3.1
-    # via theblues
-msgpack==1.0.2
-    # via oslo.serialization
-munch==2.5.0
-    # via openstacksdk
-netaddr==0.8.0
-    # via
-    #   oslo.config
-    #   oslo.utils
-netifaces==0.10.9
-    # via
-    #   openstacksdk
-    #   oslo.utils
-oauthlib==3.1.0
-    # via lazr.restfulclient
-openstacksdk==0.55.0
-    # via
-    #   osc-lib
-    #   python-openstackclient
-os-service-types==1.7.0
-    # via
-    #   keystoneauth1
-    #   openstacksdk
-osc-lib==2.3.1
-    # via python-openstackclient
-oslo.config==8.5.0
-    # via python-keystoneclient
-oslo.i18n==5.0.1
-    # via
-    #   osc-lib
-    #   oslo.config
-    #   oslo.utils
-    #   python-cinderclient
-    #   python-keystoneclient
-    #   python-novaclient
-    #   python-openstackclient
-oslo.serialization==4.1.0
-    # via
-    #   python-keystoneclient
-    #   python-novaclient
-oslo.utils==4.8.0
-    # via
-    #   osc-lib
-    #   oslo.serialization
-    #   python-cinderclient
-    #   python-keystoneclient
-    #   python-novaclient
-    #   python-openstackclient
-otherstuf==1.1.0
-    # via charm-tools
-packaging==20.9
-    # via oslo.utils
-paramiko==2.7.2
-    # via
-    #   robotframework-sshlibrary
-    #   scp
-parse==1.19.0
-    # via stuf
-path.py==12.5.0
-    # via charm-tools
-path==15.1.2
-    # via path.py
-pathspec==0.3.4
-    # via charm-tools
-pbr==5.5.1
-    # via
-    #   cliff
-    #   debtcollector
-    #   jsonpath-rw-ext
-    #   keystoneauth1
-    #   openstacksdk
-    #   os-service-types
-    #   osc-lib
-    #   oslo.i18n
-    #   oslo.serialization
-    #   oslo.utils
-    #   python-cinderclient
-    #   python-keystoneclient
-    #   python-novaclient
-    #   python-openstackclient
-    #   stevedore
-    #   testresources
-pluggy==0.13.1
-    # via tox
-ply==3.11
-    # via jsonpath-rw
-prettytable==2.1.0
-    # via
-    #   cliff
-    #   python-cinderclient
-    #   python-novaclient
-protobuf==3.15.8
-    # via macaroonbakery
-py==1.10.0
-    # via tox
-pyang==2.4.0
-    # via pyangbind
-pyangbind==0.8.1
-    # via -r requirements.in
-pycparser==2.20
-    # via cffi
-pymacaroons==0.13.0
-    # via macaroonbakery
-pynacl==1.4.0
-    # via
-    #   macaroonbakery
-    #   paramiko
-    #   pymacaroons
-pyparsing==2.4.7
-    # via
-    #   cliff
-    #   httplib2
-    #   oslo.utils
-    #   packaging
-pyperclip==1.8.2
-    # via cmd2
-pyrfc3339==1.1
-    # via macaroonbakery
-python-cinderclient==7.4.0
-    # via python-openstackclient
-python-keystoneclient==4.2.0
-    # via python-openstackclient
-python-novaclient==17.4.0
-    # via python-openstackclient
-python-openstackclient==5.5.0
-    # via -r requirements.in
-pytz==2021.1
-    # via
-    #   oslo.serialization
-    #   oslo.utils
-    #   pyrfc3339
-pyyaml==5.4.1
-    # via
-    #   charm-tools
-    #   cliff
-    #   jujubundlelib
-    #   openstacksdk
-    #   oslo.config
-    #   yq
-regex==2021.3.17
-    # via
-    #   -r requirements.in
-    #   pyangbind
-requests==2.25.1
-    # via
-    #   -r requirements.in
-    #   charm-tools
-    #   keystoneauth1
-    #   macaroonbakery
-    #   oslo.config
-    #   python-cinderclient
-    #   python-keystoneclient
-    #   robotframework-requests
-    #   theblues
-requestsexceptions==1.4.0
-    # via openstacksdk
-requirements-parser==0.2.0
-    # via charm-tools
-rfc3986==1.4.0
-    # via oslo.config
-robotframework-jsonlibrary==0.3.1
-    # via -r requirements.in
-robotframework-pythonlibcore==2.2.1
-    # via robotframework-seleniumlibrary
-robotframework-requests==0.8.2
-    # via -r requirements.in
-robotframework-seleniumlibrary==5.1.3
-    # via -r requirements.in
-robotframework-sshlibrary==3.6.0
-    # via -r requirements.in
-robotframework==4.0.1
-    # via
-    #   -r requirements.in
-    #   robotframework-jsonlibrary
-    #   robotframework-requests
-    #   robotframework-seleniumlibrary
-    #   robotframework-sshlibrary
-ruamel.yaml==0.15.100
-    # via charm-tools
-scp==0.13.3
-    # via robotframework-sshlibrary
-secretstorage==2.3.1
-    # via
-    #   charm-tools
-    #   keyring
-selenium==3.141.0
-    # via robotframework-seleniumlibrary
-simplejson==3.17.2
-    # via
-    #   osc-lib
-    #   python-cinderclient
-six==1.15.0
-    # via
-    #   bcrypt
-    #   debtcollector
-    #   jsonpath-rw
-    #   keystoneauth1
-    #   launchpadlib
-    #   lazr.restfulclient
-    #   macaroonbakery
-    #   munch
-    #   oslo.i18n
-    #   protobuf
-    #   pyangbind
-    #   pymacaroons
-    #   pynacl
-    #   python-keystoneclient
-    #   tox
-    #   virtualenv
-stevedore==3.3.0
-    # via
-    #   cliff
-    #   dogpile.cache
-    #   keystoneauth1
-    #   osc-lib
-    #   oslo.config
-    #   python-cinderclient
-    #   python-keystoneclient
-    #   python-novaclient
-    #   python-openstackclient
-stuf==0.9.16
-    # via otherstuf
-testresources==2.0.1
-    # via launchpadlib
-theblues==0.5.2
-    # via libcharmstore
-toml==0.10.2
-    # via yq
-tox==3.0.0
-    # via robotframework-jsonlibrary
-translationstring==1.4
-    # via colander
-urllib3==1.26.4
-    # via
-    #   requests
-    #   selenium
-verboselogs==1.7
-    # via -r requirements.in
-vergit==1.0.2
-    # via charm-tools
-virtualenv==20.4.3
-    # via
-    #   charm-tools
-    #   tox
-wadllib==1.3.5
-    # via
-    #   launchpadlib
-    #   lazr.restfulclient
-wcwidth==0.2.5
-    # via
-    #   cmd2
-    #   prettytable
-wrapt==1.12.1
-    # via debtcollector
-xmltodict==0.12.0
-    # via yq
-yq==2.12.0
-    # via -r requirements.in
-
-# The following packages are considered to be unsafe in a requirements file:
-# pip
-# setuptools
 #######################################################################################
 # Copyright ETSI Contributors and Others.
 #
@@ -404,3 +14,420 @@
 # See the License for the specific language governing permissions and
 # limitations under the License.
 #######################################################################################
+appdirs==1.4.4
+    # via openstacksdk
+argcomplete==2.0.0
+    # via yq
+async-generator==1.10
+    # via
+    #   trio
+    #   trio-websocket
+attrs==21.4.0
+    # via
+    #   cmd2
+    #   outcome
+    #   trio
+autopage==0.4.0
+    # via cliff
+bcrypt==3.2.0
+    # via paramiko
+bitarray==2.3.5
+    # via
+    #   -r requirements.in
+    #   pyangbind
+blessings==1.6
+    # via charm-tools
+certifi==2021.10.8
+    # via
+    #   requests
+    #   urllib3
+cffi==1.15.0
+    # via
+    #   bcrypt
+    #   cryptography
+    #   pynacl
+charm-tools==2.8.3
+    # via -r requirements.in
+charset-normalizer==2.0.10
+    # via requests
+cheetah3==3.2.6.post1
+    # via charm-tools
+cliff==3.10.0
+    # via
+    #   osc-lib
+    #   python-openstackclient
+cmd2==2.3.3
+    # via cliff
+colander==1.7.0
+    # via charm-tools
+coverage==6.2
+    # via robotframework-jsonlibrary
+cryptography==36.0.1
+    # via
+    #   openstacksdk
+    #   paramiko
+    #   pyopenssl
+    #   secretstorage
+    #   urllib3
+debtcollector==2.4.0
+    # via
+    #   oslo.config
+    #   oslo.utils
+    #   python-keystoneclient
+decorator==5.1.1
+    # via
+    #   dogpile.cache
+    #   jsonpath-rw
+    #   openstacksdk
+dict2colander==0.2
+    # via charm-tools
+distlib==0.3.4
+    # via virtualenv
+distro==1.6.0
+    # via lazr.restfulclient
+dogpile.cache==1.1.5
+    # via openstacksdk
+enum34==1.1.10
+    # via pyangbind
+filelock==3.4.2
+    # via virtualenv
+h11==0.13.0
+    # via wsproto
+haikunator==2.1.0
+    # via -r requirements.in
+httplib2==0.20.2
+    # via
+    #   launchpadlib
+    #   lazr.restfulclient
+idna==3.3
+    # via
+    #   requests
+    #   trio
+    #   urllib3
+iso8601==1.0.2
+    # via
+    #   colander
+    #   keystoneauth1
+    #   openstacksdk
+    #   oslo.utils
+    #   python-novaclient
+    #   python-openstackclient
+jmespath==0.10.0
+    # via openstacksdk
+jsonpatch==1.32
+    # via openstacksdk
+jsonpath-rw==1.4.0
+    # via
+    #   jsonpath-rw-ext
+    #   robotframework-jsonlibrary
+jsonpath-rw-ext==1.2.2
+    # via robotframework-jsonlibrary
+jsonpointer==2.2
+    # via jsonpatch
+jsonschema==2.5.1
+    # via charm-tools
+jujubundlelib==0.5.7
+    # via
+    #   charm-tools
+    #   theblues
+keyring==20.0.1
+    # via
+    #   charm-tools
+    #   launchpadlib
+keystoneauth1==4.4.0
+    # via
+    #   openstacksdk
+    #   osc-lib
+    #   python-cinderclient
+    #   python-keystoneclient
+    #   python-novaclient
+launchpadlib==1.10.15.1
+    # via charm-tools
+lazr.restfulclient==0.14.4
+    # via launchpadlib
+lazr.uri==1.0.6
+    # via
+    #   launchpadlib
+    #   wadllib
+libcharmstore==0.0.9
+    # via charm-tools
+lxml==4.7.1
+    # via
+    #   pyang
+    #   pyangbind
+macaroonbakery==1.3.1
+    # via theblues
+msgpack==1.0.3
+    # via oslo.serialization
+munch==2.5.0
+    # via openstacksdk
+netaddr==0.8.0
+    # via
+    #   oslo.config
+    #   oslo.utils
+netifaces==0.11.0
+    # via
+    #   openstacksdk
+    #   oslo.utils
+oauthlib==3.1.1
+    # via lazr.restfulclient
+openstacksdk==0.61.0
+    # via
+    #   osc-lib
+    #   python-openstackclient
+os-service-types==1.7.0
+    # via
+    #   keystoneauth1
+    #   openstacksdk
+osc-lib==2.4.2
+    # via python-openstackclient
+oslo.config==8.7.1
+    # via python-keystoneclient
+oslo.i18n==5.1.0
+    # via
+    #   osc-lib
+    #   oslo.config
+    #   oslo.utils
+    #   python-cinderclient
+    #   python-keystoneclient
+    #   python-novaclient
+    #   python-openstackclient
+oslo.serialization==4.2.0
+    # via
+    #   python-keystoneclient
+    #   python-novaclient
+oslo.utils==4.12.1
+    # via
+    #   osc-lib
+    #   oslo.serialization
+    #   python-cinderclient
+    #   python-keystoneclient
+    #   python-novaclient
+    #   python-openstackclient
+otherstuf==1.1.0
+    # via charm-tools
+outcome==1.1.0
+    # via trio
+packaging==21.3
+    # via oslo.utils
+paramiko==2.9.2
+    # via
+    #   robotframework-sshlibrary
+    #   scp
+parse==1.19.0
+    # via stuf
+path==16.3.0
+    # via path.py
+path.py==12.5.0
+    # via charm-tools
+pathspec==0.3.4
+    # via charm-tools
+pbr==5.8.0
+    # via
+    #   cliff
+    #   debtcollector
+    #   jsonpath-rw-ext
+    #   keystoneauth1
+    #   openstacksdk
+    #   os-service-types
+    #   osc-lib
+    #   oslo.i18n
+    #   oslo.serialization
+    #   oslo.utils
+    #   python-cinderclient
+    #   python-keystoneclient
+    #   python-novaclient
+    #   python-openstackclient
+    #   stevedore
+platformdirs==2.4.1
+    # via virtualenv
+pluggy==0.13.1
+    # via tox
+ply==3.11
+    # via jsonpath-rw
+prettytable==3.0.0
+    # via
+    #   cliff
+    #   python-cinderclient
+    #   python-novaclient
+protobuf==3.19.3
+    # via macaroonbakery
+py==1.11.0
+    # via tox
+pyang==2.5.2
+    # via pyangbind
+pyangbind==0.8.1
+    # via -r requirements.in
+pycparser==2.21
+    # via cffi
+pymacaroons==0.13.0
+    # via macaroonbakery
+pynacl==1.5.0
+    # via
+    #   macaroonbakery
+    #   paramiko
+    #   pymacaroons
+pyopenssl==21.0.0
+    # via urllib3
+pyparsing==3.0.6
+    # via
+    #   cliff
+    #   httplib2
+    #   oslo.utils
+    #   packaging
+pyperclip==1.8.2
+    # via cmd2
+pyrfc3339==1.1
+    # via macaroonbakery
+python-cinderclient==8.2.0
+    # via python-openstackclient
+python-keystoneclient==4.4.0
+    # via python-openstackclient
+python-novaclient==17.6.0
+    # via python-openstackclient
+python-openstackclient==5.7.0
+    # via -r requirements.in
+pytz==2021.3
+    # via
+    #   oslo.serialization
+    #   oslo.utils
+    #   pyrfc3339
+pyyaml==5.4.1
+    # via
+    #   -r requirements.in
+    #   charm-tools
+    #   cliff
+    #   jujubundlelib
+    #   openstacksdk
+    #   oslo.config
+    #   yq
+regex==2021.11.10
+    # via
+    #   -r requirements.in
+    #   pyangbind
+requests==2.27.1
+    # via
+    #   -r requirements.in
+    #   charm-tools
+    #   keystoneauth1
+    #   macaroonbakery
+    #   oslo.config
+    #   python-cinderclient
+    #   python-keystoneclient
+    #   robotframework-requests
+    #   theblues
+requestsexceptions==1.4.0
+    # via openstacksdk
+requirements-parser==0.5.0
+    # via charm-tools
+rfc3986==2.0.0
+    # via oslo.config
+robotframework==4.1.3
+    # via
+    #   -r requirements.in
+    #   robotframework-jsonlibrary
+    #   robotframework-requests
+    #   robotframework-seleniumlibrary
+    #   robotframework-sshlibrary
+robotframework-jsonlibrary==0.3.1
+    # via -r requirements.in
+robotframework-pythonlibcore==3.0.0
+    # via robotframework-seleniumlibrary
+robotframework-requests==0.9.2
+    # via -r requirements.in
+robotframework-seleniumlibrary==6.0.0
+    # via -r requirements.in
+robotframework-sshlibrary==3.8.0
+    # via -r requirements.in
+ruamel.yaml==0.15.100
+    # via charm-tools
+scp==0.14.2
+    # via robotframework-sshlibrary
+secretstorage==2.3.1
+    # via
+    #   charm-tools
+    #   keyring
+selenium==4.1.0
+    # via robotframework-seleniumlibrary
+simplejson==3.17.6
+    # via
+    #   osc-lib
+    #   python-cinderclient
+six==1.16.0
+    # via
+    #   bcrypt
+    #   jsonpath-rw
+    #   keystoneauth1
+    #   launchpadlib
+    #   lazr.restfulclient
+    #   macaroonbakery
+    #   munch
+    #   pyangbind
+    #   pymacaroons
+    #   pyopenssl
+    #   python-keystoneclient
+    #   tox
+    #   virtualenv
+sniffio==1.2.0
+    # via trio
+sortedcontainers==2.4.0
+    # via trio
+stevedore==3.5.0
+    # via
+    #   cliff
+    #   dogpile.cache
+    #   keystoneauth1
+    #   osc-lib
+    #   oslo.config
+    #   python-cinderclient
+    #   python-keystoneclient
+    #   python-novaclient
+    #   python-openstackclient
+stuf==0.9.16
+    # via otherstuf
+theblues==0.5.2
+    # via libcharmstore
+toml==0.10.2
+    # via yq
+tox==3.0.0
+    # via robotframework-jsonlibrary
+translationstring==1.4
+    # via colander
+trio==0.19.0
+    # via
+    #   selenium
+    #   trio-websocket
+trio-websocket==0.9.2
+    # via selenium
+types-setuptools==57.4.7
+    # via requirements-parser
+urllib3[secure]==1.26.8
+    # via
+    #   requests
+    #   selenium
+verboselogs==1.7
+    # via -r requirements.in
+vergit==1.0.2
+    # via charm-tools
+virtualenv==20.13.0
+    # via
+    #   charm-tools
+    #   tox
+wadllib==1.3.6
+    # via lazr.restfulclient
+wcwidth==0.2.5
+    # via
+    #   cmd2
+    #   prettytable
+wrapt==1.13.3
+    # via debtcollector
+wsproto==1.0.0
+    # via trio-websocket
+xmltodict==0.12.0
+    # via yq
+yq==2.13.0
+    # via -r requirements.in
+
+# The following packages are considered to be unsafe in a requirements file:
+# pip
+# setuptools