Handle re-running linode-create role better
Currently, the role runs through just fine the first time.
The second, however, blows up. I've disabled the idempotency checks for this role because the Linode module is really flaky right now.
What we need to do right now is: make the role pass when running twice. It won't be creating a new Linode so it shouldn't be creating new SSH keys and root passwords and all that. It probably shouldn't be building a dynamic host.
This is marked as important because if you want to re-run the role to apply some UFW/Fail2Ban changes (or whatever), the role breaks before it gets to run those roles.