fetching a published PULP_MANIFEST throws a 404 if file repo version contains no units
Ticket moved to GitHub: "pulp/pulp_file/610":https://github.com/pulp/pulp_file/issues/610
1. Create a repository
2. Create a file publisher
3. Publish the publisher
4. Create a distribution from the publication
5. Fetch PULP_MANIFEST
Receive a 404. According to the docs a PULP_MANIFEST should be created by default for all file publishes (unless the filename has been configured differently in the publisher).