private Map<String, String> getDesiredConfigMap(String clusterName, String versionTag,
                                                  String configType, Map<String, String[]> keys) throws NoSuchParentResourceException,
      UnsupportedPropertyException, SystemException {
    return getDesiredConfigMap(clusterName, versionTag, configType, keys, null);
  }
Gets the desired configuration version tag for the given cluster and config
type.

@param clusterName
         the cluster name
@param configType
         the configuration type (for example <code>hdfs-site</code>).
@return
ambari-server/src/main/java/org/apache/ambari/server/controller/internal/AbstractProviderModule.java