Also fixes tox env for py38-consul tests
Update zuul script to use consul 1.7.4 (2020) vs 0.6.3 (2016)
Adds ACL tokens to all session management calls.
Change-Id: Iaddf21f14c434129541e7c9ec7134e0661f7be52
list-table is easier to be maintained.
In addition, we avoid too long lines.
We no longer have too long lines which doc8 complains,
so doc8 ignore_path can be dropped.
Change-Id: I574391295288ef9e33744aa608c2f2930a6e46f8