code: private ClusterManagerService.Client getCMSClient()
      throws TTransportException {
      // Get the current configuration
      CoronaConf conf = new CoronaConf(getConf());
      return getCMSClient(conf);
    }
docs: Get the thrift client to communicate with the cluster manager
  @return a thrift client initialized to talk to the cluster manager
  @throws TTransportException