code: public Vertigo deployCluster(Handler<AsyncResult<Cluster>> doneHandler) {
      return deployCluster(ContextUri.createUniqueScheme(), doneHandler);
    }
docs: Deploys a randomly named unique cluster.
  
  @param doneHandler An asynchronous handler to be called once the cluster
  has been deployed. The handler will be called with a {@link Cluster}
  which can be used to manage networks running in the cluster.
  @return The Vertigo instance.