Import the openstackid authentication project

This represents the initial seed of the central authentication and
single-sign-on solution for the OpenStack Foundation site, with the
intent that it can later be integrated with or consumed by other
infrastructure systems to simplify authentication across multiple
developer and community resources alike.

Change-Id: Iafa5323d4b7876c90ad99338466d9c8b773b08ee
Merge "Import the openstackid authentication project"