"Mass" migration tool to version 2

[msimonneau-dev]

We saw the video about the migration step to version 2.
As we currently have ~25 gateways, we would like to know if migration could be made through API calls or something else to avoid a lot of "click".
*We already managed all of them through automation (Ansible/API)

[teon]

@msimonneau-dev we have auto-adoption for gateways but we need to test it "on scale". But we will do it after 2.0 release.