Use pacemaker for running ceilometer central agent

Ceilometer central agent can not be scaled out, only one instance
of central agent can run. Let pacemaker to manage central agent
in active/passive mode.

Relies on: I44909005d9bc653c3e7c2de1c12fe4ffecf6bede
Related to blueprint tripleo-icehouse-ha-production-configuration

Relies on: Icc97e36a1db198b973041346cf2056f68de661a2
Change-Id: Ifa83d62c2132bcdcb40d0b7c80ce3adadc0b5587
Merge "Use pacemaker for running ceilometer central agent"