To make this work, I changed the twenty_days_ago setup to use
`config-next` when the main test phase is running `config`. That, in
turn, made the recheck_caa test fail, so I added a tweak to that.
I also moved the authzv2 migrations into `db`. Without that change,
the integration test would fail during the twenty_days_ago setup because
Boulder would attempt to create authzv2 objects but the table wouldn't
exist yet.
Jacob Hoffman-Andrews