Comment 2 for bug 610858

Staging show we have no registration data. This is not a trivial fix, but it it not hard either.

    * Update PersonSet.newTeam() to accept the registrant argument
      * default value is None.
    * Update the two callsite to pass ``registrant=view.user``:
      registry/browser/{objectreassignment;team}.py
    * Use the registration slot to insert the person and date that the
      team was registered
      * Only show ``by <person>`` if there is a registrant

^ The last point needs agreement. We could show the owning user (not team) to assume the person.