Github is just a mirror of the OpenStack git-repo.
Changed from Github to OpenStack git url wherever possible.
Change-Id: I7941ef86967de4efe7f23ff9fb11ec86c793901e
Previously, a spec did not exist to define how Kolla will support
highly available OpenStack services.
Change-Id: I8fcc60f26d2cb98179be6b520c13abb22a372ecf