[Katello] Pull Request Label Usage

Devs,

This is a reminder that if you have commit access to a repository, and are
reviewing pull requests there are labels for a reason and it is part of
your responsibility to use them. They help indicate to other reviewers as
well as the pull request author the current status of the pull request.
Please use them.

··· -- Eric D. Helms Red Hat Engineering Ph.D. Student - North Carolina State University