This fixes two issues with the Ceph dashboards in Grafana: the
first fix addresses an incorrect heading for Utilized Capacity in
the ceph cluster dashboard (was reporting utilized as available),
and the second fix addresses the Pool Usage gauge to accurately
reflect the percentage of the pool used (was incorrectly
multiplying the percentage result by 100 a second time, resulting
in large and inaccurate results)
Change-Id: I024a555cdb82ee181eb414337b84e7ad62717c97
c524931707