LU-4010 lov: Don't wait for active target with OBD_STATFS_NODELAY

LU-4010 lov: Don't wait for active target with OBD_STATFS_NODELAY

commit 6c3c5c7b breaks OBD_STATFS_NODELAY behaviour.
It adds unnecessary delay while running df command with inactive OSTs.
We shouldn't try to recover connection to OST in this case.

Change-Id: Ia04cfb76b393df4f0c4c8d841b48d20306025c92
Signed-off-by: Andriy Skulysh <Andriy_Skulysh@xyratex.com>
Reviewed-on: http://review.whamcloud.com/7762
Reviewed-by: Andreas Dilger <andreas.dilger@intel.com>
Tested-by: Hudson
Tested-by: Maloo <whamcloud.maloo@gmail.com>
Reviewed-by: Oleg Drokin <oleg.drokin@intel.com>