Comment 2 for bug 1802032

Reviewed: https://review.openstack.org/608207
Committed: https://git.openstack.org/cgit/openstack/stx-clients/commit/?id=cc79b5659049b6d882eaa176858f30b7006d9d58
Submitter: Zuul
Branch: master

commit cc79b5659049b6d882eaa176858f30b7006d9d58
Author: 98k <18552437190@163.com>
Date: Fri Oct 5 10:30:30 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: I9383c8f33cf476b7c8dff184089e40aa591c6d6c
    Closes-Bug: #1802032