@Override
  public String updateForClusterCreate(String propertyName,
                                       String origValue,
                                       Map<String, Map<String, String>> properties,
                                       ClusterTopology topology) {
    Stack stack = topology.getBlueprint().getStack();
    return updateForClusterCreate(stack, serviceName, configType, propertyName, origValue);
  }
@return property value with updated unit
ambari-server/src/main/java/org/apache/ambari/server/controller/internal/UnitUpdater.java