adding assert to check content_type in GET /images/<id> test
adding assert to check content_type in GET /images/<id> test
citrix-openstack-build/glance,dims/glance,stevelle/glance,scripnichenko/glance,redhat-openstack/glance,tanglei528/glance,redhat-openstack/glance,ozamiatin/glance,openstack/glance,sigmavirus24/glance,wkoathp/glance,paramite/glance,takeshineshiro/glance,rajalokan/glance,ntt-sic/glance,paramite/glance,cloudbau/glance,scripnichenko/glance,JioCloud/glance,vuntz/glance,klmitch/glance,darren-wang/gl,jumpstarter-io/glance,darren-wang/gl,tanglei528/glance,rajalokan/glance,takeshineshiro/glance,dims/glance,rickerc/glance_audit,ntt-sic/glance,kfwang/Glance-OVA-OVF,saeki-masaki/glance,jumpstarter-io/glance,rickerc/glance_audit,sigmavirus24/glance,JioCloud/glance,saeki-masaki/glance,openstack/glance,openstack/glance,wkoathp/glance,cloudbau/glance,SUSE-Cloud/glance,citrix-openstack-build/glance,vuntz/glance,ozamiatin/glance,kfwang/Glance-OVA-OVF,klmitch/glance,stevelle/glance,SUSE-Cloud/glance,akash1808/glance,akash1808/glance