Network restart is not working on RHEL 8

[olifre]

Expected Behavior

Network interfaces to be restarted after (re)configuration.

Actual Behavior

(/Stage[main]/Network/Exec[service network restart]/returns) Redirecting to /bin/systemctl restart network.service
(/Stage[main]/Network/Exec[service network restart]/returns) Failed to restart network.service: Unit network.service not found.
(/Stage[main]/Network/Exec[service network restart]) Failed to call refresh: 'service network restart' returned 5 instead of one of [0]
(/Stage[main]/Network/Exec[service network restart]) 'service network restart' returned 5 instead of one of [0]

Steps to Reproduce the Problem

1. Change anything requiring interface reconfiguration using this module on RHEL 8, e.g. configure statically.

[alvagante]

Fixed in #299