Review all of monit integrations

[jonhattan]

This pattern is duplicated ad nauseum:

    $init_system = $::operatingsystem ? {
      'Debian' => $::lsbdistcodename ? {
        'jessie' => 'sysv',
        default  => undef,
      },
      default  => undef,
    }

Perhaps it is legitimate (I think of a service that has not updated to systemd yet). But it lacks inline documentation.

Also there's a gap in debian/redhat support. Bring up some vagrant boxes and complete the job!