Small fixes in Dockerfile, requirements and setup.py

Adds envs in Dockerfile
Adds version_command in setup.py
Cleans unused deps in requirements.txt

Signed-off-by: Benjamin Diaz <bdiaz@whitestack.com>
diff --git a/requirements.txt b/requirements.txt
index 071104c..fd9c838 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -19,14 +19,10 @@
 # For those usages not covered by the Apache License, Version 2.0 please
 # contact: prithiv.mohan@intel.com or adrian.hoban@intel.com
 kafka==1.3.*
-lxml==4.2.*
 requests==2.18.*
-logutils==0.3.*
 cherrypy==14.0.*
 jsmin==2.2.*
 jsonschema==2.6.*
-python-openstackclient==3.15.*
-python-novaclient==10.1.*
 python-keystoneclient==3.15.*
 boto==2.48
 python-cloudwatchlogs-logging==0.0.3
@@ -37,4 +33,4 @@
 bottle==0.12.*
 peewee==3.1.*
 pyyaml==3.*
-git+https://osm.etsi.org/gerrit/osm/common.git@857731b#egg=osm-common
\ No newline at end of file
+git+https://osm.etsi.org/gerrit/osm/common.git#egg=osm-common
\ No newline at end of file