Switch to official Ussuri jobs
Switch to official Ussuri jobs

Change-Id: I0d823c6f55179bd79e1e15ff50b044dc269b71e7

openstack/horizon,ChameleonCloud/horizon,openstack/horizon,openstack/horizon,ChameleonCloud/horizon,openstack/horizon,ChameleonCloud/horizon,ChameleonCloud/horizon