Stop testing python2.7

Change-Id: I82e9b43ba70313ccf94badccc6d607c3b8920e4e

.zuul.yaml

@@ -76,10 +76,12 @@
       - release-notes-jobs-python3
     check:
       jobs:
+        - openstack-tox-pep8
         - qinling-tempest
     gate:
       queue: qinling
       jobs:
+        - openstack-tox-pep8
         - qinling-tempest
     experimental:
       jobs:

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

@@ -1,9 +1,10 @@
 [tox]
 minversion = 2.0
-envlist = py27,py37,pep8
+envlist = py37,pep8
 skipsdist = True
 
 [testenv]
+basepython = python3
 usedevelop = True
 install_command = pip install -c{env:UPPER_CONSTRAINTS_FILE:https://opendev.org/openstack/requirements/raw/branch/master/upper-constraints.txt} {opts} {packages}
 setenv =
@@ -18,7 +19,6 @@ whitelist_externals =
   find
 
 [testenv:pep8]
-basepython = python3
 commands = flake8 {posargs}
 
 [testenv:genconfig]
@@ -29,12 +29,10 @@ commands =
 
 #set PYTHONHASHSEED=0 to prevent oslo_policy.sphinxext from randomly failing.
 [testenv:venv]
-basepython = python3
 setenv = PYTHONHASHSEED=0
 commands = {posargs}
 
 [testenv:cover]
-basepython = python3
 setenv =
     {[testenv]setenv}
     PYTHON=coverage run --source qinling --parallel-mode
@@ -42,7 +40,6 @@ commands =
     {toxinidir}/tools/cover.sh {posargs}
 
 [testenv:docs]
-basepython = python3
 deps = -r{toxinidir}/doc/requirements.txt
 whitelist_externals = rm
 commands =
@@ -50,13 +47,11 @@ 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 -W -d releasenotes/build/doctrees -b html releasenotes/source releasenotes/build/html
 
 [testenv:debug]
-basepython = python3
 commands = oslo_debug_helper {posargs}
 
 [flake8]
@@ -72,14 +67,12 @@ exclude=.venv,.git,.tox,dist,doc,*lib/python*,*egg,tools,build,example
 enable-extensions=H106,H203,H204,H205,H904
 
 [testenv:lower-constraints]
-basepython = python3
 deps =
   -c{toxinidir}/lower-constraints.txt
   -r{toxinidir}/test-requirements.txt
   -r{toxinidir}/requirements.txt
 
 [testenv:api-ref]
-basepython = python3
 deps = -r{toxinidir}/doc/requirements.txt
 commands =
   rm -rf api-ref/build