title: endpointscfg.py returning TypeError when app uses endpoints-proto-datastore
body: <p>When I run
  endpointscfg.py get_client_lib java -bs grandle x.apis.app</p>
  
  <p>I get
  TypeError: x.apis.app is not a ProtoRPC service</p>
  
  <p>Is there a work around for this?</p>