@Override
  public ConfigGroupResponse getConfigGroupUpdateResults(ConfigGroupRequest configGroupRequest) {
    return configGroupUpdateCache.getIfPresent(configGroupRequest);
  }
Save cluster update results to retrieve later
@param clusterRequest   cluster request info
@param clusterResponse  cluster response info
ambari-server/src/main/java/org/apache/ambari/server/controller/AmbariManagementControllerImpl.java