Add message to channel.close().

Author: Steve Powell

src/com/rabbitmq/client/AlreadyClosedException.java

@@ -17,7 +17,7 @@
 
 package com.rabbitmq.client;
 
-/*
+/**
  * Thrown when application tries to perform an action on connection/channel
  * which was already closed
  */

src/com/rabbitmq/client/impl/DefaultExceptionHandler.java

@@ -65,7 +65,7 @@ protected void handleChannelKiller(Channel channel, Throwable exception, String
                 + channel + ":");
         exception.printStackTrace();
         try {
-            channel.close();
+            channel.close(AMQP.REPLY_SUCCESS, "Closed due to exception from " + what);
         } catch (AlreadyClosedException ace) {
             // noop
         } catch (IOException ioe) {