Update pytest from 3.1.1 to 3.1.2
Update pytest from 3.1.1 to 3.1.2
wagnerand/amo-validator,wagnerand/amo-validator,mozilla/amo-validator,wagnerand/amo-validator,mozilla/amo-validator,wagnerand/amo-validator,mozilla/amo-validator,mozilla/amo-validator