gluster: additional parsing of host UUID in verb glusterVolumesList

This patch adds parsing of host UUID for all the bricks in the
verb glusterVolumesList.
This information is stored in bricksInfo which is list of dictionary
where each dictionary has name and hostUUID.
sample:
---------------------------------------------------------------
     'bricksInfo': [{
                     'name': '192.168.122.2:/tmp/t_b1',
                     'hostUuid': '04eb591b-2fd3-489e-a22c-5d342a3c713d'
                     },
                    {
                     'name': '192.168.122.2:/tmp/t_b2',
                     'hostUuid': '04eb591b-2fd3-489e-a22c-5d342a3c713d'
                     }]
---------------------------------------------------------------

Change-Id: I9057f3aea0c0ed8fb4d4ec26eaf66fe80ec581e2
Bug-Url: https://bugzilla.redhat.com/show_bug.cgi?id=1038988
Signed-off-by: ndarshan <dnarayan@redhat.com>
Reviewed-on: http://gerrit.ovirt.org/22693
Reviewed-by: Aravinda VK <avishwan@redhat.com>
Reviewed-by: Sahina Bose <sabose@redhat.com>
Reviewed-by: Dan Kenigsberg <danken@redhat.com>