monitoring: Make cluster stats to not use json o/p
monitoring: Make cluster stats to not use json o/p

This patch uses the api w/o json formatting bcoz, in pool
utilization, the percent used doesn't come as part of json
api response.

Change-Id: Ia3175629317d547dfd6cc78db82fa3393f1abf9f
Bug-Url: https://bugzilla.redhat.com/show_bug.cgi?id=1355723
Signed-off-by: anmolbabu <3d38fb1e9c5ff2662fc415254efcdfedb95b84d5@gmail.com>

skyrings/bigfin,skyrings/bigfin,skyrings/bigfin