fix bug lp:1019230,update rpc from openstack-common.
fix bug lp:1019230,update rpc from openstack-common.

Change-Id: I498e578affef4fa9df6c50cd7284ebd7e3f9a64e

dougwig/x-neutron-fwaas,dougwig/x-neutron-vpnaas,dougwig/x-neutron-lbaas,schoksey/networking-odl,mestery/x-stackforge-odl,gotostack/neutron-lbaas,openstack/networking-odl,gotostack/neutron-lbaas,citrix-openstack-build/neutron-vpnaas,openstack/neutron-fwaas,openstack/networking-odl,gandelman-a/neutron-lbaas,CiscoSystems/networking-odl,flavio-fernandes/networking-odl,citrix-openstack-build/neutron-lbaas,openstack/neutron-vpnaas,openstack/networking-odl,openstack/neutron-vpnaas,citrix-openstack-build/neutron-fwaas,flavio-fernandes/networking-odl,openstack/neutron-fwaas,gandelman-a/neutron-lbaas,schoksey/networking-odl,gandelman-a/neutron-lbaas,FedericoRessi/networking-odl,gaolichuang/neutron-fwaas,gotostack/neutron-lbaas,gaolichuang/neutron-fwaas,CiscoSystems/networking-odl,FedericoRessi/networking-odl