Chef/Ohai >= 14 breaks attribute dependency on node['etc']['passwd']

Change in Ohai / Chef behavior after 14.0 breaks this and many other cookbooks depending on `node['etc']['passwd']`

    References:
     - https://github.com/chef/ohai/blob/master/RELEASE_NOTES.md#optional-ohai-plugins
     - https://stackoverflow.com/a/57953198/645491