Updates comment in controller configuration
Updates comment in controller configuration

Makes the comment a bit more nicer.

Change-Id: Ic4ca437e610d1436a990a74a895e8c279edd3eab

dguitarbite/OpenStack-Labs,openstack/training-labs,openstack/training-labs,dguitarbite/OpenStack-Labs,dguitarbite/OpenStack-Labs,openstack/training-labs