Revert "Revert "fix auth url as per: https://github.com/rackspace/pyrax/issues/414""
Revert "Revert "fix auth url as per: https://github.com/rackspace/pyrax/issues/414""

This reverts commit 31973aa3865123a38fad6647d131d493b73ebbf4.

CoachLogix/django-cumulus,ferrix/django-cumulus,ImaginaryLandscape/django-cumulus,django-cumulus/django-cumulus,rizumu/django-cumulus,mandx/django-cumulus