LU-6888 osp: check return value in osp_update_request_create()

LU-6888 osp: check return value in osp_update_request_create()

osp_update_request_create() should check the return value of call
to osp_object_update_request_create(), and return error if
osp_object_update_request_create() failed.

Signed-off-by: Niu Yawei <yawei.niu@intel.com>
Change-Id: I7b5486c94dec81a506402fc99b24a422c09e3c58
Reviewed-on: http://review.whamcloud.com/20941
Reviewed-by: Fan Yong <fan.yong@intel.com>
Tested-by: Jenkins
Tested-by: Maloo <hpdd-maloo@intel.com>
Reviewed-by: Bobi Jam <bobijam@hotmail.com>
Reviewed-by: Oleg Drokin <oleg.drokin@intel.com>