webadmin :  units of time (sec/ min) in runtime column

Units of time (sec/ min) in runtime column in remove brick status

and rebalance status dialog.

Change-Id: I1b72bb58fb4fd0181c912c97842e10faf50d6296
Bug-Url: https://bugzilla.redhat.com/show_bug.cgi?id=1019599
Signed-off-by: Anmol Babu <anbabu@redhat.com>