LU-631 osc: wait OSC to complete initial connection with OST

LU-631 osc: wait OSC to complete initial connection with OST

in functions lov_prep_*_set, if one OSC isn't active and it is trying
its first connection with OST, then spend some time (obd_timeout)
to wait it to complete.

Change-Id: I424dbf81b6ceebf2cfd1cf48b0f89be40c4c3df4
Signed-off-by: Hongchao Zhang <hongchao.zhang@intel.com>
Reviewed-on: http://review.whamcloud.com/2469
Tested-by: Hudson
Reviewed-by: Fan Yong <fan.yong@intel.com>
Tested-by: Maloo <whamcloud.maloo@gmail.com>
Reviewed-by: Jeremy Filizetti <jeremy.filizetti@gmail.com>
Reviewed-by: Andreas Dilger <andreas.dilger@intel.com>