Scenario list_images doesn't accept args
Scenario list_images doesn't accept args

Remove args from GlanceImages.list_images in
certification/openstack/scenario/glance.yaml

Change-Id: I686ac3b9706037046ce5ec2ca5fa141c0817afde

openstack/rally,openstack/rally,vganapath/rally,eonpatapon/rally,redhat-openstack/rally,paboldin/rally,eayunstack/rally,group-policy/rally,gluke77/rally,yeming233/rally,redhat-openstack/rally,openstack/rally,openstack/rally,paboldin/rally,eayunstack/rally,eayunstack/rally,amit0701/rally,gluke77/rally,gluke77/rally,amit0701/rally,paboldin/rally,group-policy/rally,vganapath/rally,eonpatapon/rally,vganapath/rally,amit0701/rally,gluke77/rally,yeming233/rally,vganapath/rally,aforalee/RRally,aforalee/RRally,group-policy/rally