Core library requirements update

Rather than cap libraries at older versions, I'm updating the code
to work with the newest libraries and methods.

Now using KeystoneAuth and Keystone Middleware via a specific auth
plugin and setting domain info.

Also fixing a minor bug in "user_store.py" which cropped up due to
issues when updating libraries.

Change-Id: I3e9e2f4ff3b6a1be94857622f171425ce70de969

requirements.txt

@@ -1,12 +1,12 @@
 Django>=1.8.9,<1.9
 decorator>=3.4.0
-djangorestframework>=3.0.3
-keystonemiddleware>=1.3.1
-python-keystoneclient>=1.0.0
-python-neutronclient>=2.3.10
-jsonfield>=1.0.2
-django-rest-swagger>=0.3.3
+djangorestframework>=3.4.1
+keystoneauth1>=2.11.0
+keystonemiddleware>=4.7.0
+python-keystoneclient>=3.3.0
+python-neutronclient>=5.0.0
+jsonfield>=1.0.3
+django-rest-swagger>=2.0.3
 pyyaml>=3.11
 python-rtkit>=0.7.0
 mysqlclient>=1.3.7
-