Fix localisation string usage
Fix localisation string usage

The format string for localisation needs to be a fixed
literal, otherwise translation tools do not work.

Change-Id: I8e0e38df15ec61a0ccbfa41c3ccaed3a01d1d4d5

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