code: public void setClusterSize(String clusterId, String zoneId, int newSize)
        throws InterruptedException {
      setClusterSize(instanceName.toClusterName(clusterId).getClusterName(), newSize);
    }
docs: Sets a cluster size to a specific size.
  @param clusterId
  @param zoneId
  @param newSize
  @throws InterruptedException if the cluster is in the middle of updating, and an interrupt was
  received