Comment 8 for bug 1801657

Reviewed: https://review.openstack.org/606808
Committed: https://git.openstack.org/cgit/openstack/ansible-role-systemd_service/commit/?id=bb9b88cbab9dfd27fcabdadf7b8377d2231da7ca
Submitter: Zuul
Branch: master

commit bb9b88cbab9dfd27fcabdadf7b8377d2231da7ca
Author: huang.zhiping <huang.zhiping@99cloud.net>
Date: Sun Sep 30 08:01:04 2018 +0000

    fix tox python3 overrides

    We want to default to running all tox environments under python 3, so
    set the basepython value in each environment.

    We do not want to specify a minor version number, because we do not
    want to have to update the file every time we upgrade python.

    We do not want to set the override once in testenv, because that
    breaks the more specific versions used in default environments like
    py35 and py36.

    Change-Id: Iec4ce3ac5191130754f582178d1079f75bdffe8d
    Closes-Bug: #1801657