[9] Review request for 8152159 LabelUI is not updated for TitledBorder

[Alexander Scherbatiy]

Hello,
Could you review the fix:
  bug: https://bugs.openjdk.java.net/browse/JDK-8152159
  webrev: http://cr.openjdk.java.net/~alexsch/8152159/webrev.00


  The TitledBorder label is only used for painting and does not belong  
to any component hierarchy so it is not updated by 
SwingUtilities.updateComponentTreeUI() method.
  The fix updates the  TitledBorder label UI when the label is requested.

  Thanks,
  Alexandr.