Fixing auto_test.py for Python 2.6
Fixing auto_test.py for Python 2.6

jtl999/certbot,bsmr-misc-forks/letsencrypt,stweil/letsencrypt,jsha/letsencrypt,lmcro/letsencrypt,letsencrypt/letsencrypt,bsmr-misc-forks/letsencrypt,letsencrypt/letsencrypt,lmcro/letsencrypt,stweil/letsencrypt,jtl999/certbot,jsha/letsencrypt