Add Auditor proxy role. In this way, Anonymous users are able to send notification message through proxy_roles scripts.
This should not be a problems as the related interaction is trigged on '_setFile', '_setTextContent', so if you are able to modify the content, no problem to have Auditor role.

git-svn-id: https://svn.erp5.org/repos/public/erp5/trunk@38731 20353a03-c40f-0410-a6d1-a30d3c3de9de