Title: #5378: [Backport][ipa-4-9] Fix uninstall without dns
This PR was opened automatically because PR #5376 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/5378/head:pr5378
git checkout pr5378