LU-8493 osp: Do not set stale for new osp obj

LU-8493 osp: Do not set stale for new osp obj

Do not set stale for the new OSP object, otherwise
it will cause ESTALE failure for the following
write operation, see osp_md_declare_write().

This problem is brought in by
http://review.whamcloud.com/19041

Signed-off-by: Di Wang <di.wang@intel.com>
Change-Id: Ib92deab4e0c900d59fbdc2bf50e17fd29fd2ecce
Reviewed-on: http://review.whamcloud.com/21861
Tested-by: Jenkins
Tested-by: Maloo <hpdd-maloo@intel.com>
Reviewed-by: Lai Siyao <lai.siyao@intel.com>
Reviewed-by: Fan Yong <fan.yong@intel.com>
Reviewed-by: Oleg Drokin <oleg.drokin@intel.com>