Tub._tubHasBeenShutDown has the wrong signature

[bgranger]

The Tub._tubHasBeenShutDown method is used for Tub.getReference and Tub.connectTo once Tub.stopService has been called. But _tubHasBeenShutDown has a signature that is incompatible with connectTo and stopService. Thus, if Tub.stopService has been called and the user tries to call connectTo or stopService (which both point to _tubHasBeenShutDown), they see errors like this:

exceptions.TypeError?: _tubHasBeenShutDown() takes exactly 1 argument (2 given)

To fix, this, _tubHasBeenShutDown should probably have *args and kwargs:

def _tubHasBeenShutDown(self, *args, kwargs):

raise RuntimeError?("Sorry, but this Tub has been shut down.")

[Brian Warner]

Fixed, in [96edd64cd2c7fd1b04aa65db9e513777f7cef50c]