test/java/awt/Window/OwnedWindowsSerialization/OwnedWindowsSerialization.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.

@@ -28,11 +28,13 @@
 import java.io.ByteArrayInputStream;
 import java.io.ByteArrayOutputStream;
 import java.io.ObjectInputStream;
 import java.io.ObjectOutputStream;
 
-/* @test
+/*
+ * @test
+ * @key headful
  * @bug 8027152
  * @summary Checks that ownedWindowList is serialized and deserialized properly and alwaysOnTop works after deserialization
  * @author Petr Pchelko
  * @run main OwnedWindowsSerialization
  */