Modify the v2 image tags to use domain model
Modify the v2 image tags to use domain model

A small patch to extend the work of porting v2 controllers to the new
domain model.

Part of implementing bp:glance-domain-logic-layer

Change-Id: I4fa4105f3862822a4bec869b3b72c5751160f9d3

takeshineshiro/glance,tanglei528/glance,JioCloud/glance,wkoathp/glance,kfwang/Glance-OVA-OVF,saeki-masaki/glance,rickerc/glance_audit,akash1808/glance,dims/glance,dims/glance,openstack/glance,klmitch/glance,stevelle/glance,darren-wang/gl,sigmavirus24/glance,ntt-sic/glance,wkoathp/glance,stevelle/glance,ntt-sic/glance,redhat-openstack/glance,JioCloud/glance,tanglei528/glance,klmitch/glance,cloudbau/glance,scripnichenko/glance,sigmavirus24/glance,ozamiatin/glance,rickerc/glance_audit,citrix-openstack-build/glance,scripnichenko/glance,vuntz/glance,saeki-masaki/glance,rajalokan/glance,jumpstarter-io/glance,citrix-openstack-build/glance,paramite/glance,ozamiatin/glance,rajalokan/glance,darren-wang/gl,jumpstarter-io/glance,takeshineshiro/glance,kfwang/Glance-OVA-OVF,SUSE-Cloud/glance,openstack/glance,redhat-openstack/glance,cloudbau/glance,paramite/glance,vuntz/glance,SUSE-Cloud/glance,akash1808/glance,openstack/glance