This sets the fields status, metadata and snapshot from the origin-visit
entries to None (as per the recent model change D3340)
This pulls the creation of origin-visit-status with almost the same
origin-visit entries as before. Their date are slightly smaller than the
origin-visit ones so we are able to reflect the reality of operations (first
creation of origin visits, then creation of origin-visit-status associated to
that origin-visit).
Related to D3342
Related to T2310