Fix alarm definition for cinder-volume

This commit fixes an alarm definition for cinder-volume where "service"
was set to "scheduler" instead of "volume".

With this change the "cinder-volume" and "cinder-data" clusters are now
correctly reported as UNKNOWN in Grafana and Nagios.

Change-Id: I7001fa6d5c4923d455bff90a8863b1ff05851be2
1 file changed