This recommended update for puppet fixes the following issues:

- Update to Version 3.7.3
- besides other things, finished migration to systemd - fixing [bnc#875743]

See release notes for update information:
https://docs.puppetlabs.com/puppet/3.7/reference/release_notes.html

For a full list of bugs fixes see:
https://tickets.puppetlabs.com/secure/ReleaseNote.jspa?projectId=10102&version=12001

For more details see changelogs