test/java/awt/dnd/MissingEventsOnModalDialog/MissingEventsOnModalDialogTest.java

rev 14031 : 8159690: [TESTBUG] Mark headful tests with @key headful.

Backport of 14851:980da45565c8 from jdk9.  542/842 hunks applied directly from
the patch. 44 I resolved manually.  The remaining hunks are for filenames that
do not exist in jdk8u.

*** 41,50 ****
--- 41,51 ----
  import java.awt.event.MouseAdapter;
  import java.awt.event.MouseEvent;
  
  /*
   * @test
+  * @key headful
   * @bug 8134917
   * @summary [macosx] JOptionPane doesn't receive mouse events when opened from a drop event
   * @author Alexandr Scherbatiy
   */
  public class MissingEventsOnModalDialogTest {