Clarify project-id meaning for Rackspace deployment
Clarify project-id meaning for Rackspace deployment

Change-Id: I5f05ad74697b82d1611a34ce5a1afbe7d649d778
Signed-off-by: Thanh Ha <09ea4d3a79c8bee41a16519f6a431f6bc0fd8d6f@linuxfoundation.org>

citrix-openstack/nodepool,seandst/nodepool,Tesora/tesora-nodepool,citrix-openstack/nodepool,Tesora/tesora-nodepool,seandst/nodepool