public void notifyAgentsAboutConfigsChanges(String clusterName) {
    try {
      configHelper.get().updateAgentConfigs(Collections.singleton(clusterName));
    } catch (AmbariException e) {
      LOG.error("Failed to set send agent updates: ", e);
      throw new RuntimeException("Failed to set send agent updates: " + e, e);
    }
  }
Persist cluster state for the ambari UI.  Setting this state informs that UI that a cluster has been
installed and started and that the monitoring screen for the cluster should be displayed to the user.

@param clusterName  cluster name
@param stackName    stack name
@param stackVersion stack version
ambari-server/src/main/java/org/apache/ambari/server/topology/AmbariContext.java