Update from master

Squashed commit of the following:

commit 541f9cf287bf6c7dca45fe911f8e844988711fa3
Author: garciadeblas <gerardo.garciadeblas@telefonica.com>
Date:   Tue May 23 11:59:47 2023 +0200

    Fix Fail01 to get openstack quota properly after updating client version

    Change-Id: Ief7b4d5f150d67cecf944021c2598456672a30e0
    Signed-off-by: garciadeblas <gerardo.garciadeblas@telefonica.com>

commit a86e6938d53e345b08a7ca9cc9615115f14a002a
Author: garciadeblas <gerardo.garciadeblas@telefonica.com>
Date:   Fri May 19 12:47:09 2023 +0200

    Update SA02 to take into account the VNF threshold-time

    Change-Id: Idde7fa330e8e9b141053c15edb266817c4e699c6
    Signed-off-by: garciadeblas <gerardo.garciadeblas@telefonica.com>

commit c753f67c813fa82926b3d64db759fd7d0d7aa2cc
Author: garciadeblas <gerardo.garciadeblas@telefonica.com>
Date:   Thu May 18 15:06:49 2023 +0200

    Fix error message in run_test.sh for create_k8scluster

    Change-Id: Ice2e0bc5e829e31a81cbde30ea6784de64d8ca63
    Signed-off-by: garciadeblas <gerardo.garciadeblas@telefonica.com>

commit b9dfe0317c4935294747897dc2fd1645c4983067
Author: garciadeblas <gerardo.garciadeblas@telefonica.com>
Date:   Wed May 10 17:25:47 2023 +0200

    Support of Python3.10

    This change includes required changes to make tests work in Python3.10.
    It also enables tox running as part of stage-test, which was not included before.
    For the moment, only flake8 and black envs will be checked. Some pylint
    errors have been fixed, but a few remain unsolved. That's why pylint is
    run, but its result is ignored.

    Change-Id: I29105bf849eab8b47f92627a7eea1ede31b8e05b
    Signed-off-by: garciadeblas <gerardo.garciadeblas@telefonica.com>

commit 3d7579ccc2356a23ea32878e8f0fbb0e75f59b68
Author: garciadeblas <gerardo.garciadeblas@telefonica.com>
Date:   Tue Apr 18 15:04:57 2023 +0200

    Clean stage-archive.sh and use allowlist_extenals in tox.ini

    Change-Id: I690598c770f52d805ee3516fead7fa191c90205f
    Signed-off-by: garciadeblas <gerardo.garciadeblas@telefonica.com>

commit 43f34481b4c5ccfda407a7f82a124012aab0dccc
Author: garciadeblas <gerardo.garciadeblas@telefonica.com>
Date:   Thu Feb 23 17:37:47 2023 +0100

    Fix bug 2220 to solve sol003_01 test

    Change-Id: Ic4376067a8b42e470c09ba0668c545db8ce08e55
    Signed-off-by: garciadeblas <gerardo.garciadeblas@telefonica.com>

Change-Id: Icde649f40b72a6a358ef6686fa8840f8502b2259
Signed-off-by: Dario Faccin <dario.faccin@canonical.com>
diff --git a/Dockerfile b/Dockerfile
index 6411021..9206d0c 100644
--- a/Dockerfile
+++ b/Dockerfile
@@ -22,7 +22,7 @@
 #   devops-stages/stage-build.sh
 #
 
-FROM ubuntu:20.04
+FROM ubuntu:22.04
 
 ARG APT_PROXY
 RUN if [ ! -z $APT_PROXY ] ; then \
@@ -33,5 +33,20 @@
 RUN DEBIAN_FRONTEND=noninteractive apt-get update && \
     DEBIAN_FRONTEND=noninteractive apt-get -y install \
         debhelper \
-        dh-make \
-        git
+        dh-python \
+        git \
+        python3 \
+        python3-all \
+        python3-dev \
+        python3-setuptools \
+        python3-pip \
+        tox
+
+RUN DEBIAN_FRONTEND=noninteractive apt-get -y install \
+    libcurl4-openssl-dev \
+    libssl-dev \
+    dh-make
+
+ENV LC_ALL C.UTF-8
+ENV LANG C.UTF-8
+