Have bootstrap script create the initial endpoint

Due to a few issue that exist between keystone v3 and v2.0 the endpoint
needs to be created as v2.0. If it is created as v3, v2.0 queries will not
see the endpoint.

https://bugs.launchpad.net/keystone/+bug/1470635

Change-Id: Ie7ff88b8cbb23b3ca149cb6e8d5a18a427d22038
Partially-Implements: blueprint ansible-service