gluster : Sorting the rebalance hosts status according to host name

In the status dialog the node column was not sorted and the rows used
to get flipped every time refresh happened.
Now, Node column is sorted and hence rows do not get flipped.

Change-Id: I1bd43c458d915751002758f38714b96aa0474181
Bug-Url: https://bugzilla.redhat.com/show_bug.cgi?id=1020872
Signed-off-by: Anmol Babu <anbabu@redhat.com>