test/javax/swing/JLayer/6872503/bug6872503.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.

@@ -19,11 +19,13 @@
  * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
  * or visit www.oracle.com if you need additional information or have any
  * questions.
  */
 
-/* @test
+/*
+ * @test
+ * @key headful
  * @bug 6872503
  * @summary Checks that JLayer correctly works with its AWTEventListener
  * @author Alexander Potochkin
  */