Revoke user tokens when disabling/delete a project

- Revoke tokens scoped to all users from a project when disabling or
  deleting the project.
- Fix provided by chmouel

Closes-Bug: #1179955
Change-Id: I8ab4713d513b26ced6c37ed026cec9e2df78a5e9
Merge "Revoke user tokens when disabling/delete a project" into stable/grizzly