Make sure django env var is set

Unit tests for the first patch are failing because
DJANGO_SETTINGS_MODULE is not set. Add the pieces to
do this.

Change-Id: I9aff77126acf7c2e2d59966dd825f105e809edee
Partially-Implements: blueprint horizon-lbaas-v2-ui

manage.py

@@ -0,0 +1,23 @@
+#!/usr/bin/env python
+
+# Licensed under the Apache License, Version 2.0 (the "License"); you may
+# not use this file except in compliance with the License. You may obtain
+# a copy of the License at
+#
+#      http://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
+# WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
+# License for the specific language governing permissions and limitations
+# under the License.
+
+import os
+import sys
+
+from django.core.management import execute_from_command_line  # noqa
+
+if __name__ == "__main__":
+    os.environ.setdefault("DJANGO_SETTINGS_MODULE",
+                          "openstack_dashboard.settings")
+    execute_from_command_line(sys.argv)

test-requirements.txt

@@ -7,6 +7,7 @@ hacking<0.11,>=0.10.0
 http://tarballs.openstack.org/horizon/horizon-master.tar.gz#egg=horizon
 coverage>=3.6
 discover
+django-nose>=1.2
 python-subunit>=0.0.18
 sphinx!=1.2.0,!=1.3b1,<1.3,>=1.1.2
 oslosphinx>=2.5.0 # Apache-2.0

tox.ini

@@ -10,7 +10,7 @@ setenv =
    VIRTUAL_ENV={envdir}
 deps = -r{toxinidir}/requirements.txt
        -r{toxinidir}/test-requirements.txt
-commands = python setup.py test --slowest --testr-args='{posargs}'
+commands = python manage.py test
 
 [testenv:pep8]
 commands = flake8