fix 'shutting_down' in base config (tests setting this value don't get it reset
fix 'shutting_down' in base config (tests setting this value don't get it reset

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