Reset the the watch_rule.last_evaluated on start up
Reset the the watch_rule.last_evaluated on start up

This is so we don't fire off alarms when the engine has not been running.

bug 1202552

Change-Id: Ief258fd601b48e2495ac69091a942f23a019e92c

varunarya10/heat,miguelgrinberg/heat,cwolferh/heat-scratch,takeshineshiro/heat,redhat-openstack/heat,steveb/heat,noironetworks/heat,citrix-openstack-build/heat,varunarya10/heat,rickerc/heat_audit,cryptickp/heat,NeCTAR-RC/heat,steveb/heat,dragorosson/heat,srznew/heat,takeshineshiro/heat,srznew/heat,cryptickp/heat,maestro-hybrid-cloud/heat,jasondunsmore/heat,gonzolino/heat,openstack/heat,rdo-management/heat,jasondunsmore/heat,rdo-management/heat,JioCloud/heat,ntt-sic/heat,dragorosson/heat,openstack/heat,pshchelo/heat,cwolferh/heat-scratch,redhat-openstack/heat,dims/heat,pshchelo/heat,miguelgrinberg/heat,NeCTAR-RC/heat,gonzolino/heat,dims/heat,pratikmallya/heat,rickerc/heat_audit,ntt-sic/heat,pratikmallya/heat,JioCloud/heat,rh-s/heat,rh-s/heat,maestro-hybrid-cloud/heat,citrix-openstack-build/heat,noironetworks/heat