[freeipa PR#1871][opened] Run PR-CI with Fedora 28

[tiran]

   URL: https://github.com/freeipa/freeipa/pull/1871
Author: tiran
 Title: #1871: Run PR-CI with Fedora 28
Action: opened

PR body:
"""
Signed-off-by: Christian Heimes <cheimes(a)redhat.com&gt;
"""

To pull the PR as Git branch:
git remote add ghfreeipa https://github.com/freeipa/freeipa
git fetch ghfreeipa pull/1871/head:pr1871
git checkout pr1871