Comment 9 for bug 1359989

Should be added to release notes:

"Nova hypervisor stats (CLI - nova hypervisor-stats, Horizon - hypervisors page) report is misleading when shared storage backend (Ceph) is used: the actual amount of space available/used is multiplied by the number of compute nodes. Note, that this does not affect booting of instances in any way, but only confuses the operator checking the resources usage report."