python-cffi is still in EPEL, which is a bit confusing. It got into RHEL with 7.2 I think. Please retire.
What version is in RHEL?
I'm seeing python-cffi-0.8.6-2.el7 https://git.centos.org/summary/?r=rpms/python-cffi.git
This is blocking Bodhi from building in EPEL 7.
I have retired this package in epel7.