LU-7274 gss_do_ctx_fini_rpc() passes an already freed request

LU-7274 gss_do_ctx_fini_rpc() passes an already freed request

ptlrpc_request_free(req) calls either __ptlrpc_free_req_to_pool()
OR ptlrpc_request_cache_free() depending on request from pool /
memory.

ptlrpc_req_finished()-> __ptlrpc_req_finished()->__ptlrpc_free_req()
calls either __ptlrpc_free_req_to_pool() OR ptlrpc_request_cache_free()
too, but depending on reference and request count.

Thus its safe to removed the call to ptlrpc_request_free(req).

Change-Id: Ie2dd647af6b07d2810c458707b791b71c92bc3df
Signed-off-by: akam kumar bharathi <azurelustre@gmail.com>
Reviewed-on: http://review.whamcloud.com/17574
Tested-by: Jenkins
Tested-by: Maloo <hpdd-maloo@intel.com>
Reviewed-by: John L. Hammond <john.hammond@intel.com>
Reviewed-by: Sebastien Buisson <sbuisson@ddn.com>
Reviewed-by: Jeremy Filizetti <jeremy.filizetti@gmail.com>
Reviewed-by: Oleg Drokin <oleg.drokin@intel.com>