[release] Use RDO's Wallaby Delorean packages
[release] Use RDO's Wallaby Delorean packages

This is a temporary solution until centos-release-openstack-wallaby is
available.

Change-Id: If6da19b44d4c13149fa0ad8ddb53b8bd22bd96f4

openstack/kolla,stackforge/kolla,stackforge/kolla,stackforge/kolla,openstack/kolla