This change makes rpc's throttling to be performed only if attribute throttle is set in rpcsvc_t. Change-Id: I24620095570e206f5dc8fc6208fcf55cb22a1658 BUG: 1212385 Signed-off-by: Vijay Bellur <vbellur@redhat.com> Reviewed-on: http://review.gluster.org/10268 Tested-by: NetBSD Build System Reviewed-by: Niels de Vos <ndevos@redhat.com> Tested-by: Gluster Build System <jenkins@build.gluster.com> Reviewed-by: Raghavendra G <rgowdapp@redhat.com> Tested-by: Raghavendra G <rgowdapp@redhat.com>