code: public Vertigo undeployNetwork(String cluster, String name) {
      return undeployNetwork(cluster, name, null);
    }
docs: Undeploys a complete network from the given cluster.<p>
  
  This method does not require a network configuration for undeployment. Vertigo
  will load the configuration from the fault-tolerant data store and undeploy
  components internally. This allows networks to be undeployed without the network
  configuration.
  
  @param cluster The cluster from which to undeploy the network.
  @param name The name of the network to undeploy.
  @return The Vertigo instance.