webadmin : Order the Add Block Host List

Order the Add Block Host List

Change-Id: Idcc47e29a5e54ff2bd76bb71fe8a56ebf4ff28ab
Bug-url: https://bugzilla.redhat.com/show_bug.cgi?id=1044124
Signed-off-by: Anmol Babu <anbabu@redhat.com>