Add gerrit notifications for new Savanna projects.

Change-Id: I66a84199ddd2209b31853ed3d068e738c6afbbb9
Reviewed-on: https://review.openstack.org/31199
Reviewed-by: Monty Taylor <mordred@inaugust.com>
Approved: James E. Blair <corvus@inaugust.com>
Reviewed-by: James E. Blair <corvus@inaugust.com>
Tested-by: Jenkins