scrubber: dont print URI of image to be deleted
scrubber: dont print URI of image to be deleted

Print the ID not the URI of the image to to be scrubbed
as the URI can contain credentials

fixes bug lp# 1171851

Change-Id: Ice2d3d25a23bae31380759b87b50228ba358dcf1

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