Code review comment for lp:~tim-simpson/nova/multiple-notifiers

Thanks Sandy.

When the notification driver can't be loaded I load a class which remembers the raised exception and raises it every time notify is called. So if a notification driver fails to load you see mention of it in the logs each time notify is called. The alternative was to log something the first time and never again. If people want to do this instead I'll go ahead and update the code.

I also changed the authors file and removed the extra underscore from the private function.