Comment 9 for bug 1801657

Reviewed: https://review.openstack.org/606763
Committed: https://git.openstack.org/cgit/openstack/ansible-role-systemd_networkd/commit/?id=759d4f0e7738d6056a1b756ca9d785c388bf7c94
Submitter: Zuul
Branch: master

commit 759d4f0e7738d6056a1b756ca9d785c388bf7c94
Author: huang.zhiping <huang.zhiping@99cloud.net>
Date: Sun Sep 30 03:01:36 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: I16451b1ff9446a87e411b67746b47929c3581d8d
    Closes-Bug: #1801657