Ensure cinder-volumes VG persists reboot

adding losetup command to /etc/rc.d/rc.local
https://bugzilla.redhat.com/show_bug.cgi?id=947624

Change-Id: Iec56cd2e927411b8989f43bb65db4fd2925d32c2
Merge "Ensure cinder-volumes VG persists reboot"