Upgrade Zuul to just-released version 3.4.0

Change-Id: I0a0afcb4872cbf91be8bae4ea769ba71da16ba4b
1 file changed
tree: 0d9ee9ae4671000a90f3a48cbea3d1d756f8f270
  1. ansible.cfg
  2. files/
  3. production
  4. requirements.yml
  5. roles/
  6. site.yml