LU-7564 osp: Do not match the lock for OSP

LU-7564 osp: Do not match the lock for OSP

In DNE operation, we do not need match the lock
in the OSP cache, so to lock the remote object
exclusively on master MDT, then other threads on
master MDT will not be able to access the remote
object at the same time.

Signed-off-by: Di Wang <di.wang@intel.com>
Change-Id: I69a4f243fb26f4e37857fea6fd63b650b6ad046e
Reviewed-on: http://review.whamcloud.com/18206
Tested-by: Jenkins
Reviewed-by: Alex Zhuravlev <alexey.zhuravlev@intel.com>
Reviewed-by: Lai Siyao <lai.siyao@intel.com>
Tested-by: Maloo <hpdd-maloo@intel.com>
Reviewed-by: Oleg Drokin <oleg.drokin@intel.com>