8012468: [TEST_BUG]...

8012468: [TEST_BUG] javax/swing/PopupFactory/6276087/NonOpaquePopupMenuTest.java doesn't release mouse button
Reviewed-by: serb, alexsch
Contributed-by: vera.akulova@oracle.com

test/javax/swing/PopupFactory/6276087/NonOpaquePopupMenuTest.java

 /*
- * Copyright (c) 2011, Oracle and/or its affiliates. All rights reserved.
+ * Copyright (c) 2011, 2013, Oracle and/or its affiliates. All rights reserved.
  * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
  *
  * This code is free software; you can redistribute it and/or modify it
@@ -70,6 +70,7 @@ public class NonOpaquePopupMenuTest extends JFrame {
         Point p = getMenuClickPoint();
         robot.mouseMove(p.x, p.y);
         robot.mousePress(InputEvent.BUTTON1_MASK);
+        robot.mouseRelease(InputEvent.BUTTON1_MASK);
 
         toolkit.realSync();