[Soap-Python] Stop method processing via method_call event

[azurIt]

>Why can't you just return a status and/or return code along with None 
>for any objects your client is expecting?  On the client side, it would 
>just then check the status prior to interrogating the rest of the 
>message.  This is a pretty common pattern seen in web services.

We are doing just what you described but i want to stop processing in method_call event and return error status so authentication code will only be on one place (and doesn't have to be inside every method).

azur