Change timestamp management for resources
Change timestamp management for resources

When saving an event, update the timestamp on a resource to the
event timestamp instead of the current timestamp on the
collector host.

Change-Id: Ice378cb5be0820d8b817b7c4f635b8a5a8eef3b5
Signed-off-by: Doug Hellmann <8c845c26a3868dadec615703cd974244eb2ac6d1@dreamhost.com>

NeCTAR-RC/ceilometer,rickerc/ceilometer_audit,tanglei528/ceilometer,luogangyi/Ceilometer-oVirt,NeCTAR-RC/ceilometer,rackerlabs/instrumented-ceilometer,mathslinux/ceilometer,maestro-hybrid-cloud/ceilometer,froyobin/ceilometer,ityaptin/ceilometer,tanglei528/ceilometer,dreamhost/ceilometer,Juniper/ceilometer,rickerc/ceilometer_audit,eayunstack/ceilometer,openstack/aodh,cernops/ceilometer,JioCloud/ceilometer,r-mibu/ceilometer,redhat-openstack/ceilometer,fabian4/ceilometer,citrix-openstack-build/ceilometer,maestro-hybrid-cloud/ceilometer,citrix-openstack-build/ceilometer,redhat-openstack/ceilometer,rackerlabs/instrumented-ceilometer,tanglei528/ceilometer,r-mibu/ceilometer,idegtiarov/ceilometer,dreamhost/ceilometer,froyobin/ceilometer,chungg/aodh,citrix-openstack-build/ceilometer,sileht/aodh,sileht/aodh,eayunstack/ceilometer,isyippee/ceilometer,pczerkas/aodh,pkilambi/ceilometer,JioCloud/ceilometer,idegtiarov/ceilometer,ityaptin/ceilometer,cernops/ceilometer,mathslinux/ceilometer,m1093782566/openstack_org_ceilometer,pkilambi/ceilometer,luogangyi/Ceilometer-oVirt,pczerkas/aodh,openstack/ceilometer,MisterPup/Ceilometer-Juno-Extension,rickerc/ceilometer_audit,fabian4/ceilometer,NeCTAR-RC/ceilometer,openstack/ceilometer,openstack/aodh,Juniper/ceilometer,shootstar/ctest,JioCloud/ceilometer,rackerlabs/instrumented-ceilometer,chungg/aodh,isyippee/ceilometer,shootstar/ctest,MisterPup/Ceilometer-Juno-Extension,m1093782566/openstack_org_ceilometer