test/javax/swing/JInternalFrame/5066752/bug5066752.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.

@@ -20,10 +20,11 @@
  * or visit www.oracle.com if you need additional information or have any
  * questions.
  */
 /*
   @test
+  @key headful
   @bug 5066752
   @summary  Transparent JDesktopPane impossible because isOpaque() returns true
   @author mb50250: area=JDesktopPane
   @library ../../regtesthelpers
   @build Util