certbot will switch to Python 3 sometime in the future. If we want to ship the same version in EPEL 7 we need to provide a Python 3 version of python-dns-lexicon.
This package has changed maintainer in the Fedora. Reassigning to the new maintainer of this component.
PR: https://src.fedoraproject.org/rpms/python-dns-lexicon/pull-request/3
Closing since EL7 is EOL in less than a year and we're not going to support python3 cerbot packages on EL7.