Run openstack-ceilometer-central with Pacemaker/Systemd

The resource agent is not working properly on RHEL plateforms because of
systemd.
For now, let's use systemd resource in Pacemaker.
Later, we will refactore all Pacemaker usage to have something
Puppetish.

The idea is for now to close the bug and drop a blocker to deploye this
service.

Closes-bug: #1403131

Change-Id: Ia694c2c460db882ba2f82aedad55c1a77691397f