Ignore ceilometer.conf
Ignore ceilometer.conf

ceilometer.conf will be generated after we run tox -egenconfig, it
should be ignored.

Change-Id: Ia6d88892a7c93cfa880e4383bbefa55c069a12d9

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