py23: use string.ascii_lowercase
py23: use string.ascii_lowercase

instead of string.lowercase, as the later is not available in python 3.

SUSE-Cloud/automation,SUSE-Cloud/automation,SUSE-Cloud/automation,aspiers/automation,gosipyan/automation,aspiers/automation,gosipyan/automation,gosipyan/automation,aspiers/automation,SUSE-Cloud/automation,gosipyan/automation,aspiers/automation