When doing the role upgrade, we run every playbook with current's
branch ansible. This is normal for the infrastructure bits (which
are running on current branch), but not for the installation of
the previous branch's role, which should use previous branch's
environment.
This commit adds:
- A new venv build script, containing the previous version of ansible
- A split between the infrastructure bits (running current ansible),
the previous role run, and the upgrade of the role.
Change-Id: I91fe4e867750d7cee9ad7d84b005eb0231849df9
Signed-off-by: Jean-Philippe Evrard <jean-philippe@evrard.me>
Closes-Bug: #1741471
91b7524603