Fix redis service restarting for Ceilometer

In Ubuntu redis service is named as redis-server. So in this
patchset different restarting for this service at different
OSes have been added.

Change-Id: I406e3556c7b9a2bef8277f34862375c5ffd3888e
Closes-bug: #1405147

lib/ceilometer

@@ -272,12 +272,12 @@ function init_ceilometer {
 function install_redis {
     if is_ubuntu; then
         install_package redis-server
+        restart_service redis-server
     else
         # This will fail (correctly) where a redis package is unavailable
         install_package redis
+        restart_service redis
     fi
-
-    restart_service redis
 }
 
 # install_ceilometer() - Collect source and prepare