test/java/awt/Focus/ActualFocusedWindowTest/ActualFocusedWindowRetaining.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      4823903
   @summary  Tests actual focused window retaining.
   @author   Anton.Tarasov: area=awt.focus
   @library  ../../regtesthelpers
   @build    Util