(MAINT) Whitespace for readability
(QENG-894) Use puppet to restart puppet

This way we don't have to detect which init system is being used. Since this
is currently only used for with_puppet_running_on it should always have puppet
available.
Merge pull request #348 from pcarlisle/qeng-894-systemd-with-puppet-running

(QENG-894) Fix with_puppet_running_on for systemd