Revert "Issue #3260173 by andregp, joachim, tstoeckler, nod_: Media should set...

Revert "Issue #3260173 by andregp, joachim, tstoeckler, nod_: Media should set the owner field to anonymous if no explicit owner is set"

This reverts commit 7aa35b3f.

(cherry picked from commit 6415ee9b)