Update django-openstack-auth repo

It is now in openstack and should be grabbed from openstack account.

Change-Id: I48d9897731dffea4bc7a9d58bfe62486b1388a64
Add ceilometer-client and heat-client components

These client modules are required by recent Horizon.

Change-Id: Ifc7e650875dd2330c0e208bef8b15f8d5e584add