The call from platform.linux_distribution was depdrecated in Python 3.7.
This patch solves this problem, using the recomended package distro.
Signed-off-by: Rodolfo García Peñas (kix) <kix@kix.es>
The file utils/distro.py is renamed to utils/distro_utils.py
because we need import the distro file to update some calls.
The file is used in IMAP.py, I need change the import.
