Fix the py27 failure because of "ephemeral_key_uuid" error
Fix the py27 failure because of "ephemeral_key_uuid" error

Change-Id: Ic520a1657106a10a595240f84455eec1b79c2de0

openstack/ceilometer,sileht/aodh,cernops/ceilometer,luogangyi/Ceilometer-oVirt,cernops/ceilometer,luogangyi/Ceilometer-oVirt,NeCTAR-RC/ceilometer,pkilambi/ceilometer,maestro-hybrid-cloud/ceilometer,ityaptin/ceilometer,ityaptin/ceilometer,pczerkas/aodh,NeCTAR-RC/ceilometer,isyippee/ceilometer,m1093782566/openstack_org_ceilometer,Juniper/ceilometer,sileht/aodh,isyippee/ceilometer,r-mibu/ceilometer,redhat-openstack/ceilometer,froyobin/ceilometer,m1093782566/openstack_org_ceilometer,mathslinux/ceilometer,pkilambi/ceilometer,mathslinux/ceilometer,idegtiarov/ceilometer,tanglei528/ceilometer,r-mibu/ceilometer,MisterPup/Ceilometer-Juno-Extension,openstack/aodh,fabian4/ceilometer,redhat-openstack/ceilometer,idegtiarov/ceilometer,Juniper/ceilometer,eayunstack/ceilometer,maestro-hybrid-cloud/ceilometer,MisterPup/Ceilometer-Juno-Extension,froyobin/ceilometer,tanglei528/ceilometer,chungg/aodh,eayunstack/ceilometer,NeCTAR-RC/ceilometer,pczerkas/aodh,chungg/aodh,openstack/aodh,fabian4/ceilometer,openstack/ceilometer,tanglei528/ceilometer