Suppress serialization warnings

All classes that implement java.io.Serializable are now explicitly
marked with @SuppressWarnings("serial").  This serves as an indication
that none of the classes are suitable for transmission across process
boundaries.  This may be revisited over time and as necessary the
annotation may be removed in favor of a generated serialVersionUID.

Until such time, there Spring AMQP maintains no serialization
compatibility guarantees for any class so annotated.

stocks/src/main/java/org/springframework/amqp/rabbit/stocks/ui/StockPanel.java

@@ -49,6 +49,7 @@ import com.jgoodies.forms.layout.FormLayout;
  * @author Mark Pollack
  * @author Mark Fisher
  */
+@SuppressWarnings("serial")
 public class StockPanel extends JPanel {
 
 	private static Log log = LogFactory.getLog(StockPanel.class);