Description:
------------
AMQPExchangeException, and possibly others, do not supply the error code in $e->code, element. Only as a part of teh actual text message. 
This makes error trapping slightly complex, slow and horrible.

Test script:
---------------
try{
						  $this->oProdExchange->declare($sName, $npExchangeType); 
						  			}catch(AMQPExchangeException $e){
   $code = $e->getCode();     // $code = 0... always
}

Expected result:
----------------
If the exchange being used generates a:
[message:protected] => Server channel error: 406, message: PRECONDITION_FAILED...
I would expect:

[code:protected] => 406   Not [code:protected] => 0