Drop python 2.7 support and testing

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

python-dracclient supports python 3 and is ready to drop 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/691178

Change-Id: I7171e749707430c2c21c81976174e1278679c9c1

doc/requirements.txt

@@ -2,6 +2,5 @@
 # of appearance. Changing the order has an impact on the overall integration
 # process, which may cause wedges in the gate later.
 
-sphinx!=1.6.6,!=1.6.7,<2.0.0;python_version=='2.7'  # BSD
 sphinx!=1.6.6,!=1.6.7,!=2.1.0;python_version>='3.4'  # BSD
 openstackdocstheme  # Apache-2.0

setup.cfg

@@ -12,8 +12,6 @@ classifier =
     License :: OSI Approved :: Apache Software License
     Operating System :: POSIX
     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

tox.ini

@@ -1,5 +1,5 @@
 [tox]
-envlist = py37,py36,py27,pep8
+envlist = py37,py36,pep8
 
 [testenv]
 usedevelop = True
@@ -7,6 +7,7 @@ install_command = pip install -U -c{env:UPPER_CONSTRAINTS_FILE:https://opendev.o
 deps =
     -r{toxinidir}/requirements.txt
     -r{toxinidir}/test-requirements.txt
+basepython = python3
 setenv = PYTHONDONTWRITEBYTECODE=1
 commands =
     coverage run --branch --source dracclient --omit "dracclient/tests*" -m unittest discover dracclient.tests
@@ -16,7 +17,6 @@ commands =
 commands = {posargs}
 
 [testenv:pep8]
-basepython = python2.7
 commands =
     flake8 dracclient
     doc8 README.rst CONTRIBUTING.rst doc/source

zuul.d/project.yaml

@@ -1,4 +1,3 @@
 - project:
     templates:
-      - openstack-python-jobs
       - openstack-python3-ussuri-jobs