Drop python 2.7 support and testing

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

python-zaqarclient 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: I7df21753bccf435b81b5f42a63845d67fe209a55
(cherry picked from commit 93811d1ab1)

.zuul.yaml

@@ -15,8 +15,7 @@
     templates:
       - check-requirements
       - openstack-lower-constraints-jobs
-      - openstack-python-jobs
-      - openstack-python3-train-jobs
+      - openstack-python3-ussuri-jobs
       - openstackclient-plugin-jobs
       - publish-openstack-docs-pti
       - release-notes-jobs-python3

doc/requirements.txt

@@ -1,8 +1,7 @@
 # The order of packages is significant, because pip processes them in the order
 # 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,>=1.6.2,<2.0.0;python_version=='2.7'  # BSD
-sphinx!=1.6.6,!=1.6.7,>=1.6.2;python_version>='3.4'  # BSD
+sphinx!=1.6.6,!=1.6.7,>=1.6.2  # BSD
 os-client-config>=1.28.0 # Apache-2.0
 openstackdocstheme>=1.18.1 # Apache-2.0
 reno>=2.5.0 # Apache-2.0

playbooks/zaqarclient-dsvm-functional/run.yaml

@@ -63,7 +63,6 @@
           export ZAQARCLIENT_TEST_FUNCTIONAL=1
           function post_test_hook {
               cd /opt/stack/new/python-zaqarclient
-              nosetests tests.functional
           }
 
           export -f post_test_hook

releasenotes/notes/drop-py-2-7-20019a123a9d5e8f.yaml

@@ -0,0 +1,6 @@
+---
+upgrade:
+  - |
+    Python 2.7 support has been dropped. Last release of python-zaqarclient
+    to support py2.7 is OpenStack Train. The minimum version of Python now
+    supported by python-zaqarclient is Python 3.6.

setup.cfg

@@ -16,8 +16,6 @@ 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

tox.ini

@@ -1,9 +1,11 @@
 [tox]
-minversion = 2.0
-envlist = py27,py37,pep8
+minversion = 3.1.1
+envlist = py37,pep8
 skipsdist = True
+ignore_basepython_conflict = True
 
 [testenv]
+basepython = python3
 usedevelop = True
 # Customize pip command, add -U to force updates.
 install_command = pip install {opts} {packages}
@@ -23,11 +25,9 @@ whitelist_externals = find
 sitepackages = True
 
 [testenv:pep8]
-basepython = python3
 commands = flake8
 
 [testenv:cover]
-basepython = python3
 setenv = {[testenv]setenv}
          PYTHON=coverage run --source zaqarclient --parallel-mode
 commands =
@@ -37,16 +37,13 @@ commands =
     coverage xml -o cover/coverage.xml
 
 [testenv:venv]
-basepython = python3
 commands = {posargs}
 
 [testenv:docs]
-basepython = python3
 deps = -r{toxinidir}/doc/requirements.txt
 commands = sphinx-build -W -b html doc/source doc/build/html
 
 [testenv:releasenotes]
-basepython = python3
 deps = -r{toxinidir}/doc/requirements.txt
 commands = sphinx-build -a -E -d releasenotes/build/doctrees -b html releasenotes/source releasenotes/build/html
 
@@ -55,7 +52,6 @@ builtins = _
 exclude = .venv,.git,.tox,dist,doc,*.egg
 
 [testenv:lower-constraints]
-basepython = python3
 deps =
   -c{toxinidir}/lower-constraints.txt
   -r{toxinidir}/test-requirements.txt