l3_rpc: Fix a comment typo
l3_rpc: Fix a comment typo

Change-Id: Ibd6a9928b84567ac6ad93077d26072d4de560a95

cisco-openstack/neutron,neoareslinux/neutron,sebrandon1/neutron,openstack/neutron,yuewko/neutron,dims/neutron,mattt416/neutron,mahak/neutron,jerryz1982/neutron,bgxavier/neutron,cloudbase/neutron,watonyweng/neutron,eonpatapon/neutron,yuewko/neutron,miyakz1192/neutron,mahak/neutron,skyddv/neutron,huntxu/neutron,barnsnake351/neutron,sasukeh/neutron,MaximNevrov/neutron,apporc/neutron,suneeth51/neutron,antonioUnina/neutron,bigswitch/neutron,vivekanand1101/neutron,cisco-openstack/neutron,wolverineav/neutron,silenci/neutron,noironetworks/neutron,cloudbase/neutron,glove747/liberty-neutron,bigswitch/neutron,JioCloud/neutron,mahak/neutron,pnavarro/neutron,bgxavier/neutron,infobloxopen/neutron,yanheven/neutron,paninetworks/neutron,suneeth51/neutron,JioCloud/neutron,adelina-t/neutron,takeshineshiro/neutron,chitr/neutron,dhanunjaya/neutron,wolverineav/neutron,klmitch/neutron,javaos74/neutron,mandeepdhami/neutron,aristanetworks/neutron,Stavitsky/neutron,skyddv/neutron,shahbazn/neutron,barnsnake351/neutron,openstack/neutron,Stavitsky/neutron,neoareslinux/neutron,JianyuWang/neutron,SmartInfrastructures/neutron,takeshineshiro/neutron,swdream/neutron,NeCTAR-RC/neutron,SmartInfrastructures/neutron,yanheven/neutron,asgard-lab/neutron,jerryz1982/neutron,mandeepdhami/neutron,miyakz1192/neutron,dims/neutron,sebrandon1/neutron,antonioUnina/neutron,watonyweng/neutron,huntxu/neutron,mmnelemane/neutron,aristanetworks/neutron,pnavarro/neutron,dhanunjaya/neutron,eonpatapon/neutron,javaos74/neutron,wenhuizhang/neutron,mmnelemane/neutron,apporc/neutron,SamYaple/neutron,jacknjzhou/neutron,chitr/neutron,sasukeh/neutron,shahbazn/neutron,glove747/liberty-neutron,silenci/neutron,noironetworks/neutron,eayunstack/neutron,infobloxopen/neutron,SamYaple/neutron,igor-toga/local-snat,MaximNevrov/neutron,JianyuWang/neutron,paninetworks/neutron,wenhuizhang/neutron,vivekanand1101/neutron,eayunstack/neutron,NeCTAR-RC/neutron,jacknjzhou/neutron,klmitch/neutron,adelina-t/neutron,jumpojoy/neutron,swdream/neutron,asgard-lab/neutron,mattt416/neutron,jumpojoy/neutron,openstack/neutron,igor-toga/local-snat