gluster: Check gluster uuid when updating brick status

If vdsm output for glusterVolumeStatus returns the gluster
host uuid - use this to get the corresponding brick
in the database.
This will solve the issue with brick qualified name using
a different hostname than the one engine is aware of.

Change-Id: Iffea910092f693b83e51f92ea13f1014b8a40faf
Bug-Url: https://bugzilla.redhat.com/1103973
Signed-off-by: Sahina Bose <sabose@redhat.com>