Corrected Ceilmeter installation for RHEL/CentOS/Fedora

Set correct package and service names for Ceilometer on RHEL, CentOS,
Fedora and derivative distributions.

Change-Id: I32e8fb4963739c2495b5e94c4eb87d0b8e920b97
backport: havana
(cherry picked from commit 112df7ab42c68eefdaa55bc2ced763aa9070ceb3)
Merge "Corrected Ceilmeter installation for RHEL/CentOS/Fedora" into stable/havana