Add system classes for Ceph monitoring

Change-Id: Ia4556d72b8193af21164f35d23732ed4b5945e4d
Depends-On: If7359aca34a350f2c8ee2251bbe8a85314550a45
diff --git a/ceph/monitoring/cluster_stats.yml b/ceph/monitoring/cluster_stats.yml
new file mode 100644
index 0000000..8e2138c
--- /dev/null
+++ b/ceph/monitoring/cluster_stats.yml
@@ -0,0 +1,2 @@
+classes:
+- service.ceph.monitoring.cluster_stats