Take into account actual compute.(ceph|lvm).ephemeral value

This change adds additinal check for compute.(ceph|lvm).ephemeral
assuming it is boolean var.

Changes are for Ocata and Pike as they are stable supported releases
by now.

PROD: https://mirantis.jira.com/browse/PROD-19636
Change-Id: I73c3e646b146f33617fb7e72113f4efa3d492b04
2 files changed