Avoid clobbering existing class definition
Avoid clobbering existing class definition

Using the same variable name for a new class implies that an
existing class is being modified whereas what's happening is that a
subclass is being created of an existing class and having a
different value for an attribute. Such an implication is confusing
for maintainability.

Change-Id: If784949e8b5706e881bc702ff0b30848bca17d5c

r-mibu/ceilometer,isyippee/ceilometer,froyobin/ceilometer,cernops/ceilometer,redhat-openstack/ceilometer,MisterPup/Ceilometer-Juno-Extension,pczerkas/aodh,chungg/aodh,sileht/aodh,froyobin/ceilometer,mathslinux/ceilometer,r-mibu/ceilometer,m1093782566/openstack_org_ceilometer,pkilambi/ceilometer,Juniper/ceilometer,Juniper/ceilometer,eayunstack/ceilometer,cernops/ceilometer,openstack/aodh,idegtiarov/ceilometer,openstack/aodh,maestro-hybrid-cloud/ceilometer,openstack/ceilometer,pczerkas/aodh,m1093782566/openstack_org_ceilometer,openstack/ceilometer,fabian4/ceilometer,maestro-hybrid-cloud/ceilometer,redhat-openstack/ceilometer,ityaptin/ceilometer,eayunstack/ceilometer,pkilambi/ceilometer,MisterPup/Ceilometer-Juno-Extension,mathslinux/ceilometer,fabian4/ceilometer,chungg/aodh,ityaptin/ceilometer,idegtiarov/ceilometer,sileht/aodh,isyippee/ceilometer