monitoring: Add rbd entity id fetch
monitoring: Add rbd entity id fetch

Add rbd entity id fetch to getEntityIdFromNameAndUtilizationType
used by monitoring's threshold analysis function.

Change-Id: I0d447b7929e2b0e29cae75a8140139723dd60bfc
Signed-off-by: anmolbabu <3d38fb1e9c5ff2662fc415254efcdfedb95b84d5@gmail.com>

skyrings/skyring-common,skyrings/skyring-common