Drop python 2.7 support and testing

OpenStack is dropping the py2.7 support in ussuri cycle.

virtualbmc is ready with python 3 and ok to drop the
python 2.7 support.

Complete discussion & schedule can be found in
- http://lists.openstack.org/pipermail/openstack-discuss/2019-October/010142.html
- https://etherpad.openstack.org/p/drop-python2-support

Ussuri Communtiy-wide goal - https://review.opendev.org/#/c/691178/

Change-Id: I9c62fd735641d6538a5ea2a699ed47718d481d3b

releasenotes/notes/drop-py-2-7-afe69612bfabaeee.yaml

@@ -0,0 +1,5 @@
+upgrade:
+  - |
+    Python 2.7 support has been dropped. Last release of virtualbmc
+    to support Python 2.7 is OpenStack Train. The minimum version of Python now
+    supported by virtualbmc is Python 3.6.

setup.cfg

@@ -13,8 +13,6 @@ classifier =
     License :: OSI Approved :: Apache Software License
     Operating System :: POSIX :: Linux
     Programming Language :: Python
-    Programming Language :: Python :: 2
-    Programming Language :: Python :: 2.7
     Programming Language :: Python :: 3
     Programming Language :: Python :: 3.6
     Programming Language :: Python :: 3.7

test-requirements.txt

@@ -7,7 +7,6 @@ hacking!=0.13.0,<0.14,>=0.12.0 # Apache-2.0
 coverage!=4.4,>=4.0 # Apache-2.0
 doc8>=0.6.0 # Apache-2.0
 python-subunit>=1.0.0 # Apache-2.0/BSD
-sphinx!=1.6.6,!=1.6.7,>=1.6.2,<2.0.0;python_version=='2.7' # BSD
 sphinx!=1.6.6,!=1.6.7,!=2.1.0,>=1.6.2;python_version>='3.4' # BSD
 openstackdocstheme>=1.20.0 # Apache-2.0
 oslotest>=3.2.0 # Apache-2.0

tox.ini

@@ -1,9 +1,10 @@
 [tox]
 minversion = 2.0
 skipsdist = True
-envlist = py3,py27,pep8
+envlist = py3,pep8
 
 [testenv]
+basepython = python3
 usedevelop = True
 setenv = VIRTUAL_ENV={envdir}
          PYTHONDONTWRITEBYTECODE = 1
@@ -21,17 +22,14 @@ commands =
 passenv = http_proxy HTTP_PROXY https_proxy HTTPS_PROXY no_proxy NO_PROXY
 
 [testenv:pep8]
-basepython = python3
 commands =
     flake8 {posargs}
     doc8 README.rst CONTRIBUTING.rst HACKING.rst doc/source
 
 [testenv:venv]
-basepython = python3
 commands = {posargs}
 
 [testenv:cover]
-basepython = python3
 setenv = {[testenv]setenv}
          PYTHON=coverage run --source virtualbmc --parallel-mode
 commands =
@@ -41,22 +39,18 @@ commands =
   coverage xml -o cover/coverage.xml
 
 [testenv:docs]
-basepython = python3
 commands = python setup.py build_sphinx
 
 [testenv:pdf-docs]
-basepython = python3
 whitelist_externals = make
 commands = sphinx-build -b latex doc/source doc/build/pdf
            make -C doc/build/pdf
 
 [testenv:releasenotes]
-basepython = python3
 commands =
   sphinx-build -a -E -W -d releasenotes/build/doctrees -b html releasenotes/source releasenotes/build/html
 
 [testenv:debug]
-basepython = python3
 commands = oslo_debug_helper {posargs}
 
 [flake8]
@@ -66,7 +60,6 @@ max-complexity=17
 
 
 [testenv:lower-constraints]
-basepython = python3
 deps =
   -c{toxinidir}/lower-constraints.txt
   -r{toxinidir}/test-requirements.txt

zuul.d/project.yaml

@@ -2,7 +2,6 @@
     templates:
       - release-notes-jobs-python3
       - publish-openstack-docs-pti
-      - openstack-python-jobs
       - openstack-python3-ussuri-jobs
       - check-requirements
     check: