Add unit tests around glance-manage
Add unit tests around glance-manage

Adds unit tests around glance-manage

Implements bp adds-tests-around-glance-manage
Change-Id: Ia40030ee00b2555e1ee6f57760d2794a45f25325

redhat-openstack/glance,openstack/glance,ozamiatin/glance,klmitch/glance,kfwang/Glance-OVA-OVF,takeshineshiro/glance,darren-wang/gl,stevelle/glance,darren-wang/gl,rajalokan/glance,paramite/glance,openstack/glance,openstack/glance,sigmavirus24/glance,scripnichenko/glance,rajalokan/glance,akash1808/glance,sigmavirus24/glance,tanglei528/glance,akash1808/glance,vuntz/glance,JioCloud/glance,jumpstarter-io/glance,stevelle/glance,scripnichenko/glance,klmitch/glance,saeki-masaki/glance,kfwang/Glance-OVA-OVF,jumpstarter-io/glance,takeshineshiro/glance,dims/glance,wkoathp/glance,saeki-masaki/glance,ozamiatin/glance,vuntz/glance,dims/glance,redhat-openstack/glance,paramite/glance,tanglei528/glance,wkoathp/glance,JioCloud/glance