test/java/awt/Focus/ClearGlobalFocusOwnerTest/ClearGlobalFocusOwnerTest.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 4390555
   @summary Synopsis: clearGlobalFocusOwner() is not trigerring permanent FOCUS_LOST event
   @author son@sparc.spb.su, anton.tarasov: area=awt.focus
   @library   ../../regtesthelpers
   @build Util