Currently it runs role::puppet::self for the master, which is a strange copypasta version of puppetmaster config from a long time ago (See T120159 for details). We need to do the following:

1. Move it to role::puppetmaster::standalone, which uses the puppetmaster module
2. Setup puppetdb for it
3. Make the way hiera works for deployment-prep closer to how it works for production

And maybe other things?

(Ongoing discussion, part of the ops offsite. Just a strawman proposal!)