test/java/awt/event/MouseEvent/EnterAsGrabbedEvent/EnterAsGrabbedEvent.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.

@@ -21,10 +21,11 @@
  * questions.
  */
 
 /*
   @test
+  @key headful
   @bug 6317481 8012325
   @summary REG:Pressing the mouse, dragging and releasing it outside the button triggers ActionEvent, XAWT
   @author Dmitry.Cherepanov@SUN.COM area=awt.event
   @run main EnterAsGrabbedEvent
 */