Test coverage for storage.py changes
Test coverage for storage.py changes

stweil/letsencrypt,mitnk/letsencrypt,lmcro/letsencrypt,wteiken/letsencrypt,bsmr-misc-forks/letsencrypt,dietsche/letsencrypt,DavidGarciaCat/letsencrypt,jsha/letsencrypt,stweil/letsencrypt,jtl999/certbot,mitnk/letsencrypt,lmcro/letsencrypt,jtl999/certbot,brentdax/letsencrypt,jsha/letsencrypt,brentdax/letsencrypt,letsencrypt/letsencrypt,DavidGarciaCat/letsencrypt,letsencrypt/letsencrypt,wteiken/letsencrypt,dietsche/letsencrypt,bsmr-misc-forks/letsencrypt