6979568: Test failure:...

6979568: Test failure: test\closed\java\awt\Component\VisibleHwInLwContTest\VisibleHwInLwContTest.html
Summary: Extend iteration to this container in isRecursivelyVisibleUpToHeavyweightContainer()
Reviewed-by: art, dcherepanov

src/share/classes/java/awt/Container.java

@@ -4187,7 +4187,7 @@ public class Container extends Component {
             return true;
         }
 
-        for (Container cont = getContainer();
+        for (Container cont = this;
                 cont != null && cont.isLightweight();
                 cont = cont.getContainer())
         {