OVS agent: fix a comment on CANARY_TABLE
OVS agent: fix a comment on CANARY_TABLE

CANARY_TABLE is for br-int, not for br-tun.  Grouping it with
constants for br-tun tables together is misleading.  Move it into
a separate section and comment appropriately.  No functional changes.

Change-Id: Ic1aed992776a87ed77665b712de7ec3bd9dab397

MaximNevrov/neutron,mandeepdhami/neutron,mattt416/neutron,bigswitch/neutron,eayunstack/neutron,openstack/neutron,aristanetworks/neutron,wenhuizhang/neutron,suneeth51/neutron,waltBB/neutron_read,infobloxopen/neutron,magic0704/neutron,eonpatapon/neutron,mmnelemane/neutron,projectcalico/calico-neutron,apporc/neutron,cernops/neutron,SmartInfrastructures/neutron,glove747/liberty-neutron,mahak/neutron,miyakz1192/neutron,vveerava/Openstack,JianyuWang/neutron,cloudbase/neutron,mahak/neutron,mattt416/neutron,rdo-management/neutron,CiscoSystems/neutron,waltBB/neutron_read,wenhuizhang/neutron,noironetworks/neutron,igor-toga/local-snat,asgard-lab/neutron,jerryz1982/neutron,leeseuljeong/leeseulstack_neutron,aristanetworks/neutron,chitr/neutron,dims/neutron,leeseulstack/openstack,cernops/neutron,openstack/neutron,jacknjzhou/neutron,magic0704/neutron,leeseulstack/openstack,mandeepdhami/neutron,projectcalico/calico-neutron,igor-toga/local-snat,jerryz1982/neutron,SmartInfrastructures/neutron,suneeth51/neutron,vveerava/Openstack,yuewko/neutron,paninetworks/neutron,MaximNevrov/neutron,adelina-t/neutron,vveerava/Openstack,swdream/neutron,dhanunjaya/neutron,shahbazn/neutron,adelina-t/neutron,noironetworks/neutron,apporc/neutron,glove747/liberty-neutron,blueboxgroup/neutron,mmnelemane/neutron,dhanunjaya/neutron,infobloxopen/neutron,jumpojoy/neutron,CiscoSystems/neutron,leeseulstack/openstack,antonioUnina/neutron,watonyweng/neutron,cloudbase/neutron,gkotton/neutron,huntxu/neutron,virtualopensystems/neutron,jacknjzhou/neutron,silenci/neutron,bgxavier/neutron,vivekanand1101/neutron,jumpojoy/neutron,pnavarro/neutron,javaos74/neutron,yanheven/neutron,sebrandon1/neutron,pnavarro/neutron,wolverineav/neutron,asgard-lab/neutron,chitr/neutron,barnsnake351/neutron,swdream/neutron,mahak/neutron,antonioUnina/neutron,Stavitsky/neutron,JioCloud/neutron,neoareslinux/neutron,Metaswitch/calico-neutron,silenci/neutron,Metaswitch/calico-neutron,CiscoSystems/neutron,bigswitch/neutron,gkotton/neutron,sasukeh/neutron,yuewko/neutron,skyddv/neutron,cloudbase/neutron-virtualbox,SamYaple/neutron,huntxu/neutron,takeshineshiro/neutron,alexandrucoman/vbox-neutron-agent,leeseuljeong/leeseulstack_neutron,barnsnake351/neutron,bgxavier/neutron,yanheven/neutron,NeCTAR-RC/neutron,blueboxgroup/neutron,leeseuljeong/leeseulstack_neutron,javaos74/neutron,cisco-openstack/neutron,watonyweng/neutron,eayunstack/neutron,virtualopensystems/neutron,JianyuWang/neutron,openstack/neutron,sasukeh/neutron,Stavitsky/neutron,eonpatapon/neutron,SamYaple/neutron,alexandrucoman/vbox-neutron-agent,miyakz1192/neutron,cisco-openstack/neutron,shahbazn/neutron,NeCTAR-RC/neutron,vivekanand1101/neutron,paninetworks/neutron,wolverineav/neutron,redhat-openstack/neutron,takeshineshiro/neutron,sebrandon1/neutron,cloudbase/neutron-virtualbox,neoareslinux/neutron,virtualopensystems/neutron,klmitch/neutron,rdo-management/neutron,dims/neutron,redhat-openstack/neutron,skyddv/neutron,gkotton/neutron,JioCloud/neutron,blueboxgroup/neutron,klmitch/neutron