Mention ceilometer service names and alarm notifier
Mention ceilometer service names and alarm notifier

The alarm notifier was not documented, add it.
Add to all items the name of the daemon like we do in other parts
of the getstart sections.

Change-Id: Icdd5b3588d3ea733cfc746a6d101534c4be7b777
Closes-Bug: #1238582

AlekhyaMallina-Vedams/openstack-manuals,AlekhyaMallina-Vedams/openstack-manuals,gongysh2004/openstack-manual,Akasurde/openstack-manuals,gongysh2004/openstack-manual,saeki-masaki/openstack-manuals,openstack/openstack-manuals,openstack/openstack-manuals,kairoaraujo/openstack-manuals,potsmaster/openstack-manuals,Akasurde/openstack-manuals,AlekhyaMallina-Vedams/openstack-manuals,kairoaraujo/openstack-manuals,saeki-masaki/openstack-manuals,potsmaster/openstack-manuals,openstack/openstack-manuals,openstack/openstack-manuals