Add toString method.

mom-amqp/org.ow2.joram.mom.amqp/src/main/java/org/ow2/joram/mom/amqp/QueueShell.java

 /*
  * JORAM: Java(TM) Open Reliable Asynchronous Messaging
- * Copyright (C) 2009 ScalAgent Distributed Technologies
+ * Copyright (C) 2009 - 2011 ScalAgent Distributed Technologies
  * Copyright (C) 2009 CNES
  *
  * This library is free software; you can redistribute it and/or
@@ -73,4 +73,11 @@ public class QueueShell {
       return queueName.hashCode();
   }
 
+  public String toString() {
+    if (islocal()) {
+      return queue.getName() + "(local)";
+    }
+    return queueName + "(distant)";
+  }
+
 }