LU-9286 ptlrpc: fix wrong error handlers

LU-9286 ptlrpc: fix wrong error handlers

If ptlrpc_request_pack finish with 0, we need to call
ptlrpc_req_finished for later errors.

Signed-off-by: Alexander Boyko <alexander.boyko@seagate.com>
Seagate-bug-id: MRP-4285
Change-Id: I97dec565c1aa95c4457b32cb5d72b4f8abdd3d1d
Reviewed-on: https://review.whamcloud.com/26319
Tested-by: Jenkins
Reviewed-by: Chris Horn <hornc@cray.com>
Reviewed-by: Mike Pershin <mike.pershin@intel.com>
Tested-by: Maloo <hpdd-maloo@intel.com>
Reviewed-by: Niu Yawei <yawei.niu@intel.com>
Reviewed-by: Oleg Drokin <oleg.drokin@intel.com>