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.

@@ -34,10 +34,11 @@
 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