Fedora Infrastructure needs python-waitress for the bodhi2 server on epel7. I've applied for rights in pkgdb if there's anyway I can help.
I just approved them. I never made a package for epel and I would be interested in learning about the details for branching and building for it. If you can put a log of what you do in this bug that would be helpful.
Thanks! The first thing to do is click the 'request new branch' button in pkgdb: https://admin.fedoraproject.org/pkgdb/package/python-waitress/
Next, I had to patch the spec file to conditionalize the python3 subpackage (since python3 is not straightforward on epel7): http://pkgs.fedoraproject.org/cgit/python-waitress.git/commit/?id=7d555e5d12aa4135104cf0c96b1e1c7115a8ed96
python-waitress-0.8.9-5.el7 has been submitted as an update for Fedora EPEL 7. https://admin.fedoraproject.org/updates/python-waitress-0.8.9-5.el7
python-waitress-0.8.9-5.el7 has been pushed to the Fedora EPEL 7 stable repository. If problems still persist, please make note of it in this bug report.