Title: #5104: [Backport][ipa-4-8] Specify memory limits as strings for docker compose
This PR was opened automatically because PR #5103 was pushed to master and backport to
ipa-4-8 is required.
To pull the PR as Git branch:
git remote add ghfreeipa https://github.com/freeipa/freeipa
git fetch ghfreeipa pull/5104/head:pr5104
git checkout pr5104