This patchset converts much of the previous logic in
functional-tests.sh into Ansible playbooks to be executed
by Zuul. This mainly includes all the Docker-related
deployment logic.
The functional-tests.sh script has been slimmed down to
just work with uwsgi so that a standalone functional
test deployment can be performed relatively easily,
mainly by developers.
Finally, py27 support for the gate has been dropped
as the Dockerfile in this project currently assumes
python3 for installing requirements and so forth,
leading to requirements issues blocking the gate.
Change-Id: I903a2845390061641d292fb0c016ba6a53723fc9
119080b597