The CDN has 'listing' files which katello uses to allow repo enabling. When a subscription is added to a distributor and that manifest is imported into another katello org, the pulp repo must have a 'listing' file in order to allow repos to be enabled.

These listing files need to be created somehow in pulp.

To reproduce:
1. import Red Hat manifest for RHEL into katello
2. enable a repo, sync content, create a CV with that repo
3. create a distributor
4. attach subscription covering above repo
5. export manifest
6. import manifest into second org in same katello
7. set CDN url in katello to point to https://localhost/pulp/repos/<org 1>/<environment>/<content view>/
8. go to enable repos page and note unable to drill down to repos due to missing listing file