Add API for Service Group info and refactor project api

Change-Id: I1988213d58f4816cd2f62ea33cacd0c463bdb8fb
Clean up service group interface

* Split service group management away from project management.
* Combine add member and remove member interfaces into a manage
  members interface.
* Remove (broken) Toggle feature from all project and region lists
  to simplify interface more.

Change-Id: I1d1d9484e5df77fe789142d7040f326c10443f33
Merge changes I1d1d9484,I1988213d

* changes:
  Clean up service group interface
  Add API for Service Group info and refactor project api