Title: #5298: [Backport][ipa-4-9] ipatests: support subordinate upn suffixes
This PR was opened automatically because PR #5254 was pushed to master and backport to
ipa-4-9 is required.
To pull the PR as Git branch:
git remote add ghfreeipa https://github.com/freeipa/freeipa
git fetch ghfreeipa pull/5298/head:pr5298
git checkout pr5298