tox: Integrate tox-docker

This allows us to start a zookeeper instance via docker as part of the
standard tox process, avoiding issues like those described in [1]. It's
exposed as a separate target, to ensure users can use local
installations if necessary. This requires bumping the minimum version of
tox to 3.2 so we can make use of the 'requires' config option [2].

[1] https://review.openstack.org/#/c/648399/
[2] https://tox.readthedocs.io/en/latest/config.html#conf-requires

Change-Id: Ie848d409533b2a53523cd930299acf21ac10e13c
Signed-off-by: Stephen Finucane <stephenfin@redhat.com>

0 files changed, 0 insertions, 0 deletions