Added Python3 support.

* added tox environment variable for python 3 (py35,py35dj111)
 * updated the support python 3.5
 * Added .zuul.yaml file

Fixes bug 1878181

Change-Id: I6ca151c7fe5007bad05c11393d0b8f96cf19d926

.zuul.yaml

@@ -0,0 +1,25 @@
+- project:
+    name: x/group-based-policy-ui
+    templates:
+      - openstack-python-jobs
+      - publish-to-pypi
+    check:
+      jobs:
+        - openstack-tox-pep8:
+            nodeset: ubuntu-xenial
+        - openstack-tox-py27:
+            nodeset: ubuntu-xenial
+        - openstack-tox-py35:
+            nodeset: ubuntu-xenial
+        - test-release-openstack:
+            nodeset: ubuntu-xenial
+    gate:
+      jobs:
+        - openstack-tox-pep8:
+            nodeset: ubuntu-xenial
+        - openstack-tox-py27:
+            nodeset: ubuntu-xenial
+        - openstack-tox-py35:
+            nodeset: ubuntu-xenial
+        - test-release-openstack:
+            nodeset: ubuntu-xenial

tox.ini

@@ -1,9 +1,10 @@
 [tox]
-envlist = py26,py27,py27dj14,py27dj15,pep8,py33
+envlist = py26,py27,py27dj14,py27dj15,pep8,py33,py35,py35dj111
 minversion = 1.6
 skipsdist = True
 
 [testenv]
+basepython = python3
 usedevelop = True
 install_command = pip install -U {opts} {packages}
 setenv = VIRTUAL_ENV={envdir}
@@ -55,6 +56,15 @@ commands = nodeenv -p
 setenv = DJANGO_SETTINGS_MODULE=openstack_dashboard.test.settings
 commands = python setup.py build_sphinx
 
+[testenv:py35dj111]
+basepython = python3
+commands = pip install django>=1.11
+           /bin/bash run_tests.sh -N --no-pep8 {posargs}
+
+[testenv:py35integration]
+basepython = python3
+commands = /bin/bash run_tests.sh -N --integration --selenium-headless {posargs}
+
 [flake8]
 exclude = .venv,.git,.tox,dist,*openstack/common*,*lib/python*,*egg,build,panel_template,dash_template,local_settings.py,*/local/*,*/test/test_plugins/*,.ropeproject
 # E127 continuation line over-indented for visual indent