Pulp

So this is a very reasonable request and once we get our ducks in a row it should be easy. However, two things jump out at me from that repository that I'd really like to change before it gets set in stone.

1. Use the new treeinfo format (http://release-engineering.github.io/productmd/treeinfo-1.0.html). I assume this was built with pungi/lorax, but maybe not a recent-enough version.
2. No PULP_MANIFEST file. The treeinfo file should provide everything necessary to mirror the repository.

On our end, we need to work on #1769 and remodel how distributions work. Kickstart trees can (but are not required to) contain yum repositories. They're currently modeled to be contained by yum repositories in Pulp. I think that if we try to implement this RFE before doing the modeling work, it's going to be a real pain and will produce sub-par results. Once we've modeled it as it really is, this should "just work".

This kind of combination repository should cause us to reconsider the restriction of having only one importer per repository. It's bad enough that the YUM importer handles distributions but adding distribution sync logic to the ostree importer is completely inappropriate. We need to discuss this.