[Soap-Python] Stop method processing via method_call event

[Burak Arslan]

On 30.09.2011 18:37, azurIt wrote:
> Because it will return soap fault, i need to return correct soap response.
>
>

I'd argue strongly that an authentication error is a legitimate use-case 
for a fault. But then it's not my really place to say that.

Anyway, you can set ctx.descriptor.function in the event to whatever you 
want. normally it's set to the function decorated by @rpc.

also set the ctx.in_object to the argument array to the function. look 
at ServiceBase.call_wrapper source.

burak