Disabling python27 unit tests and enabling zuul jobs

Change-Id: I94bec5d6818cbf5d2e58589efdba7799cb6e02e7

.zuul.yaml

@@ -0,0 +1,7 @@
+- project:
+    check:
+      jobs:
+        - openstack-tox-pep8
+    gate:
+      jobs:
+        - openstack-tox-pep8

tools/flake8wrap.sh

@@ -0,0 +1,20 @@
+#!/bin/sh
+#
+# A simple wrapper around flake8 which makes it possible
+# to ask it to only verify files changed in the current
+# git HEAD patch.
+#
+# Intended to be invoked via tox:
+#
+#   tox -epep8 -- -HEAD
+#
+
+if test "x$1" = "x-HEAD" ; then
+    shift
+    files=$(git diff --name-only HEAD~1 | tr '\n' ' ')
+    echo "Running flake8 on ${files}"
+    diff -u --from-file /dev/null ${files} | flake8 --diff "$@"
+else
+    echo "Running flake8 on all files"
+    exec flake8 "$@"
+fi

tox.ini

@@ -1,22 +1,30 @@
 [tox]
 minversion = 2.0
-envlist = py36,py27,pep8
+envlist = pep8
 skipsdist = True
 
 [testenv]
+basepython = python3
 usedevelop = True
-install_command = pip install -U {opts} {packages}
 setenv =
    VIRTUAL_ENV={envdir}
-deps = -r{toxinidir}/requirements.txt
-       -r{toxinidir}/test-requirements.txt
-commands = python setup.py test --slowest --testr-args='{posargs}'
+   PYTHONWARNINGS=default::DeprecationWarning
+   OS_STDOUT_CAPTURE=1
+   OS_STDERR_CAPTURE=1
+deps =
+  -c{env:TOX_CONSTRAINTS_FILE:https://releases.openstack.org/constraints/upper/master}
+  -r{toxinidir}/requirements.txt
+  -r{toxinidir}/test-requirements.txt
+passenv = TEMPEST_* OS_TEST_*
+commands =
+  find . -type f -name "*.py[c|o]" -delete
+  stestr run {posargs}
 
 [testenv:pep8]
-commands = flake8
+commands =
+  bash tools/flake8wrap.sh {posargs}
 
 [testenv:venv]
-basepython = python3
 commands = {posargs}
 
 [testenv:genconfig]
@@ -42,7 +50,6 @@ commands = bandit -c bandit.yaml -r cloudpulse -p gate
 
 [flake8]
 # E123, E125 skipped as they are invalid PEP-8.
-
 show-source = True
 ignore = E123,E125
 builtins = _