Fix cached-images API endpoint
Fix cached-images API endpoint

The recent chages that renamed 'id' to 'image_id' in the cached_images controller broke the API. This reverts a couple
of those changes.

Change-Id: I83345f87c7e5f1e35ef6646cb360819d489ec256

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