Add cmd.polling.CLI_OPTS to option list
Add cmd.polling.CLI_OPTS to option list

polling_namespaces and pollster_list are defined but not present
in etc/ceilometer/ceilometer.conf after run tox -egenconfig.

Change-Id: I27494bfda826a3b2a093a5c0e523acbfa8e4de62

fabian4/ceilometer,r-mibu/ceilometer,ityaptin/ceilometer,pkilambi/ceilometer,chungg/aodh,idegtiarov/ceilometer,isyippee/ceilometer,mathslinux/ceilometer,redhat-openstack/ceilometer,maestro-hybrid-cloud/ceilometer,r-mibu/ceilometer,cernops/ceilometer,eayunstack/ceilometer,pczerkas/aodh,sileht/aodh,eayunstack/ceilometer,maestro-hybrid-cloud/ceilometer,idegtiarov/ceilometer,Juniper/ceilometer,pczerkas/aodh,fabian4/ceilometer,redhat-openstack/ceilometer,pkilambi/ceilometer,openstack/ceilometer,sileht/aodh,openstack/aodh,mathslinux/ceilometer,ityaptin/ceilometer,openstack/ceilometer,cernops/ceilometer,Juniper/ceilometer,chungg/aodh,isyippee/ceilometer,openstack/aodh