Added test for "delete image member for public image".
Added test for "delete image member for public image".

Also fixed some typos.

Change-Id: I590d6988fc3452739ce6b741dc96d6f868d24875

openstack/glance,paramite/glance,ozamiatin/glance,akash1808/glance,openstack/glance,scripnichenko/glance,ozamiatin/glance,paramite/glance,dims/glance,vuntz/glance,rajalokan/glance,stevelle/glance,dims/glance,kfwang/Glance-OVA-OVF,openstack/glance,scripnichenko/glance,takeshineshiro/glance,rajalokan/glance,stevelle/glance,kfwang/Glance-OVA-OVF,vuntz/glance,saeki-masaki/glance,akash1808/glance,saeki-masaki/glance,takeshineshiro/glance,klmitch/glance,klmitch/glance