EditMOM3 seems to be able to add `atom:author/atom:email` different from logged-in user/original owner of a document

Created by: GVogeler

/db/mom-data/xrx.user/martina.buergermeister%40uni-graz.at/metadata.charter/d737b70d-24e3-414a-8cdc-f780608258d2/97abbea9-5e0a-4fcd-8c74-cd35bbc78ff0.charter.xml with <atom:email xmlns:atom="http://www.w3.org/2005/Atom">guest</atom:email>

/db/mom-data/xrx.user/markus.gneiss%40oeaw.ac.at/metadata.charter/4a260b05-e94e-4f58-af5a-62c0886d0a56/0a7b31c5-6010-4cda-aedf-9635f02ff198.charter.xml with <atom:email xmlns:atom="http://www.w3.org/2005/Atom">guest</atom:email>

"/db/mom-data/xrx.user/stephan.makowski%40uni-koeln.de/metadata.charter/cbeb4c09-5964-4d99-bd04-f526ef72a58c/d8a4ab66-f52b-41de-91fa-b4177af12e5d.charter.xml with <atom:email xmlns:atom="http://www.w3.org/2005/Atom">admin</atom:email>