Errata changing in the upstream repo is not being reflected in the Katello DB
If an erratum changes in the upstream repo, Pulp will create a new advisory. Katello is not detecting this and is keeping the old erratum href, even if it no longer exists.
Steps to reproduce:
1) Use the python simple http server to host the "zoo" repo in the Katello source code's test/fixtures/test_repos
2) Sync that local repo
3) Edit an erratum (the title or description perhaps) in the repo's updateinfo.xml, delete everything in repodata, run ./create, and host again.
4) Sync the repo again using a complete sync. This forces content indexing to run.
5) Look at the erratum in the repository. Note that the erratum has not been updated with what you expect
6) To be extra sure a new erratum was generated, use the pulp cli to check the advisories in the repo's latest version. You should see that your edited erratum/advisory is correct in Pulp