Avoid unneeded debug messages
Avoid unneeded debug messages

Some WSGI process (I think fanstatic) is making calls to localhost. This
shouldn't trigger setup_thread in lib/instance/discriminator.py.

Doing so avoids the following warning message:

> DEBUG [adhocracy.lib.instance.discriminator] No such instance:
localhost, defaulting!

DanielNeugebauer/adhocracy,phihag/adhocracy,liqd/adhocracy,SysTheron/adhocracy,DanielNeugebauer/adhocracy,phihag/adhocracy,alkadis/vcv,liqd/adhocracy,liqd/adhocracy,phihag/adhocracy,alkadis/vcv,DanielNeugebauer/adhocracy,alkadis/vcv,phihag/adhocracy,alkadis/vcv,DanielNeugebauer/adhocracy,alkadis/vcv,DanielNeugebauer/adhocracy,liqd/adhocracy,SysTheron/adhocracy,phihag/adhocracy,SysTheron/adhocracy