Increase test coverage for glance.common.wsgi
Increase test coverage for glance.common.wsgi

Add unit tests for wsgi.get_socket.

Change-Id: I3850dca6f6e4dbeca0465c8d751458e255e0fed8

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