test/java/awt/Window/WindowsLeak/WindowsLeak.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 8013563 8028486
  * @summary Tests that windows are removed from windows list
  * @library /javax/swing/regtesthelpers
  * @build Util
  * @run main/othervm -Xms32M -Xmx32M WindowsLeak