This commit formalizes some additional users to act as different project
users and updates clouds.yaml file so they're easy to use.
It creates:
- a reader on the demo project
- a reader on the alt_demo project
- a member on the alt_demo project
With the adoption of secure RBAC personas, these are useful for using
OpenStack APIs as that work continues.
Change-Id: I3237a771275311377313b7d7d80ac059ac69d031