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Pull Request (PR) description
This PR unbreak the Vagrant environment which no longer worked because Ubuntu 16.04 was too old and installation of librarian-puppet failed. Instead of trying to fix an EOL operating system migrate to Ubuntu 20.04 instead and fix all the things that need fixing.
Vagrant now makes use of Puppet 7 from Puppetlabs. This avoids some warnings triggered by the default, EOL version of Puppet (5.5) in Ubuntu 20.04.
Some of the issues that were identified were generic and not related to the operating system upgrade.