cloud/x86_64/openstack-newton
This one is EOL for stable release builds, we are keeping it around only in http://trunk.rdoproject.org/centos7-newton/ for upgrade CI purposes.
cloud/x86_64/openstack-ocata cloud/x86_64/openstack-pike cloud/x86_64/openstack-queens
Those stay under upstream and RDO maintenance as per http://releases.openstack.org/
Cheers, Alan