Remove ec2 config chain and move openstack versions to top-level application.
Remove ec2 config chain and move openstack versions to top-level application.

openstack-attic/melange,rackerlabs/melange,rajarammallya/melange,rackerlabs/melange,openstack-attic/melange,rackerlabs/melange,rajarammallya/melange,rajarammallya/melange,openstack-attic/melange