Stop testing Python 2

In Ussuri, Drop support for Python 2 according to [1] and [2]

[1] http://lists.openstack.org/pipermail/openstack-discuss/2019-October/010356.html
[2] https://governance.openstack.org/tc/resolutions/20180529-python2-deprecation-timeline.html

Change-Id: I35e871992dd21e96e7e812e440e6cafdb61d26ac

.zuul.yaml

@@ -170,17 +170,15 @@
     templates:
       - openstack-cover-jobs
       - openstack-lower-constraints-jobs
-      - openstack-python-jobs
       - openstack-python3-ussuri-jobs
       - publish-openstack-docs-pti
       - periodic-stable-jobs
       - check-requirements
-      - integrated-gate
       - integrated-gate-py3
       - release-notes-jobs-python3
     check:
       jobs:
-        - keystone-dsvm-functional:
+        - keystone-dsvm-py3-functional:
             irrelevant-files: &irrelevant-files
               - ^.*\.rst$
               - ^api-ref/.*$
@@ -188,11 +186,6 @@
               - ^etc/.*$
               - ^keystone/tests/unit/.*$
               - ^releasenotes/.*$
-        - keystone-dsvm-py3-functional:
-            irrelevant-files: *irrelevant-files
-        - keystone-dsvm-functional-federation-opensuse15:
-            voting: false
-            irrelevant-files: *irrelevant-files
         - keystone-dsvm-py3-functional-federation-opensuse15:
             voting: false
             irrelevant-files: *irrelevant-files
@@ -210,8 +203,6 @@
               - ^keystone/tests/unit/.*$
               - ^releasenotes/.*$
               - ^setup.cfg$
-        - tempest-full:
-            irrelevant-files: *tempest-irrelevant-files
         - tempest-full-py3:
             irrelevant-files: *tempest-irrelevant-files
         - neutron-grenade:

releasenotes/notes/removed-as-of-ussuri-d2f6ef8901ef54ed.yaml

@@ -0,0 +1,6 @@
+---
+upgrade:
+  - |
+    Dropping the Python2 support in OpenStack Ussuri according to
+    `the TC deprecation timeline
+    <https://governance.openstack.org/tc/resolutions/20180529-python2-deprecation-timeline.html>`_

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

tox.ini

@@ -1,11 +1,12 @@
 [tox]
 minversion = 2.5.0
 skipsdist = True
-envlist = py27,py37,pep8,api-ref,docs,genconfig,genpolicy,releasenotes,protection
+envlist = py37,pep8,api-ref,docs,genconfig,genpolicy,releasenotes,protection
 
 [testenv]
 usedevelop = True
 install_command = pip install {opts} {packages}
+basepython = python3
 setenv = VIRTUAL_ENV={envdir}
 deps = -c{env:UPPER_CONSTRAINTS_FILE:https://releases.openstack.org/constraints/upper/master}
        -r{toxinidir}/test-requirements.txt
@@ -20,14 +21,12 @@ whitelist_externals =
 passenv = http_proxy HTTP_PROXY https_proxy HTTPS_PROXY no_proxy NO_PROXY PBR_VERSION
 
 [testenv:api-ref]
-basepython = python3
 deps = -r{toxinidir}/doc/requirements.txt
 commands =
   bash -c "rm -rf api-ref/build"
   sphinx-build -W -b html -d api-ref/build/doctrees api-ref/source api-ref/build/html
 
 [testenv:pep8]
-basepython = python3
 deps =
      .[bandit]
      {[testenv]deps}
@@ -40,14 +39,12 @@ commands =
   bandit -r keystone -x 'keystone/tests/*'
 
 [testenv:fast8]
-basepython = python3
 envdir = {toxworkdir}/pep8
 commands =
   {toxinidir}/tools/fast8.sh
 passenv = FAST8_NUM_COMMITS
 
 [testenv:bandit]
-basepython = python3
 # NOTE(browne): This is required for the integration test job of the bandit
 # project. Please do not remove.
 deps = -c{env:UPPER_CONSTRAINTS_FILE:https://releases.openstack.org/constraints/upper/master}
@@ -56,7 +53,6 @@ deps = -c{env:UPPER_CONSTRAINTS_FILE:https://releases.openstack.org/constraints/
 commands = bandit -r keystone -x 'keystone/tests/*'
 
 [testenv:cover]
-basepython = python3
 # Also do not run test_coverage_ext tests while gathering coverage as those
 # tests conflict with coverage.
 setenv =
@@ -70,16 +66,13 @@ commands =
   coverage xml -o cover/coverage.xml
 
 [testenv:patch_cover]
-basepython = python3
 commands =
   bash tools/cover.sh
 
 [testenv:venv]
-basepython = python3
 commands = {posargs}
 
 [testenv:debug]
-basepython = python3
 commands =
   find keystone -type f -name "*.pyc" -delete
   oslo_debug_helper {posargs}
@@ -95,7 +88,6 @@ passenv =
     KSTEST_PROJECT_ID
 
 [testenv:functional]
-basepython = python3
 deps = -r{toxinidir}/test-requirements.txt
 setenv = OS_TEST_PATH=./keystone/tests/functional
 commands =
@@ -133,7 +125,6 @@ exclude=.venv,.git,.tox,build,dist,*lib/python*,*egg,tools,vendor,.update-venv,*
 max-complexity=24
 
 [testenv:docs]
-basepython = python3
 deps =
   -r{toxinidir}/doc/requirements.txt
   .[ldap,memcache,mongodb]
@@ -149,7 +140,6 @@ commands=
 # the workaround after this patch has merged:
 # https://review.opendev.org/#/c/679860
 [testenv:pdf-docs]
-basepython = python3
 envdir = {toxworkdir}/docs
 deps = {[testenv:docs]deps}
 whitelist_externals =
@@ -163,16 +153,13 @@ commands =
   make -C doc/build/pdf
 
 [testenv:releasenotes]
-basepython = python3
 deps = -r{toxinidir}/doc/requirements.txt
 commands = sphinx-build -a -E -W -d releasenotes/build/doctrees -b html releasenotes/source releasenotes/build/html
 
 [testenv:genconfig]
-basepython = python3
 commands = oslo-config-generator --config-file=config-generator/keystone.conf
 
 [testenv:genpolicy]
-basepython = python3
 commands = oslopolicy-sample-generator --config-file config-generator/keystone-policy-generator.conf
 
 [hacking]
@@ -182,7 +169,6 @@ import_exceptions =
 local-check-factory = keystone.tests.hacking.checks.factory
 
 [testenv:bindep]
-basepython = python3
 # Do not install any requirements. We want this to be fast and work even if
 # system dependencies are missing, since it's used to tell you what system
 # dependencies are missing! This also means that bindep must be installed
@@ -191,14 +177,12 @@ deps = bindep
 commands = bindep test
 
 [testenv:lower-constraints]
-basepython = python3
 deps =
   -c{toxinidir}/lower-constraints.txt
   -r{toxinidir}/test-requirements.txt
   .[ldap,memcache,mongodb]
 
 [testenv:protection]
-basepython = python3
 commands =
   find keystone -type f -name "*.pyc" -delete
   stestr run --test-path=./keystone/tests/protection {posargs}