test/javax/swing/JInternalFrame/8020708/bug8020708.java

rev 14031 : 8160974: [TESTBUG] Mark more headful tests with @key headful.

This is a backport of fe58d505fffd from jdk9. 228/596 hunks apply without
modifications. 16 hunks required manual rework. The remainder were for files
not present in jdk8u.

*** 34,43 ****
--- 34,44 ----
  import javax.swing.UIManager;
  import sun.awt.SunToolkit;
  
  /**
   * @test
+  * @key headful
   * @bug 8020708
   * @author Alexander Scherbatiy
   * @summary NLS: mnemonics missing in SwingSet2/JInternalFrame demo
   * @library ../../regtesthelpers
   * @build Util