- enable glance-registry notifications ( searchlight )
- notification_driver is `noop` by default (means no notifications),
so we can remove the `else` condition branch.
- this macros >
{{ oslomessaging[messaging.backend.notifications]('notifications_config') }}
should not depend on notifications consumer (searchlight,
ceilometer, etc), it is just notifications transport backend-related
config and must be commmon for all.
Change-Id: I16e9d604cb3d69e14d2124fb2ad4f603f86a87aa
5e9f301e33