Support Ceilometer services

This patch brings Ceilometer services into upgrade testing process.
For now we test only from Havana to Icehouse and from Icehouse to Juno.

Implements: blueprint grenade-upgrade-testing
Change-Id: I9cb61c5b312e197db80e537bff269b7777dddb31
Signed-off-by: Emilien Macchi <emilien.macchi@enovance.com>
Merge "Support Ceilometer services"