Clear exception on creating logs directory
Clear exception on creating logs directory

If we do not explicitly clear this exception from the current stack,
twisted will keep displaying it every time a callback end with an
exception. This is misleading at best.

pyfarm/pyfarm-agent,guidow/pyfarm-agent,guidow/pyfarm-agent,pyfarm/pyfarm-agent,pyfarm/pyfarm-agent,guidow/pyfarm-agent