migrate all templates to the parametrized classes style
fix dependency on Concat::Fragment['munin.conf.header'], was set to File which would cause this:
err: Failed to apply catalog: Could not find dependency File[/etc/munin/munin.conf.header] for Exec[set_modes_for_cgi] at /etc/puppet/modules/munin/manifests/host/cgi.pp:6
setup $::operatingsystem triggered variables for the apache_user and document_root