LU-1757 brw: added OBD short io connect flag

LU-1757 brw: added OBD short io connect flag

To prevent collisions with any future flags needed in features written
against this branch.

Signed-off-by: Alexander Boyko <alexander_boyko@xyratex.com>
Change-Id: I797ca7d9ac66c4932d8b6e8a85ced9c271fda076
Reviewed-on: http://review.whamcloud.com/3890
Tested-by: Hudson
Reviewed-by: Andreas Dilger <adilger@whamcloud.com>
Reviewed-by: Johann Lombardi <johann@whamcloud.com>
Tested-by: Maloo <whamcloud.maloo@gmail.com>
Reviewed-by: Oleg Drokin <green@whamcloud.com>