private Object parameterValue(Map<String, Object> parameters, Parameters parameter) {
    Object value = null;
    if (parameters.containsKey(parameter.getParameterKey())) {
      value = parameters.get(parameter.getParameterKey());
    } else {
      LOGGER.warn("Parameter [{}] is missing from parameters", parameter.getParameterKey());
    }
    return value;
  }
Additional parameters expected to be provided along with the configuration
ambari-server/src/main/java/org/apache/ambari/server/ldap/service/AmbariLdapFacade.java