Remove incidental md5() function uses from several tests

When Who What
2023-07-04 12:52:09 Peter Eisentraut (petere) Closed in commitfest 2023-07 with status: Committed
2023-07-04 12:52:09 Peter Eisentraut (petere) Changed committer to petere
2023-07-03 11:02:33 Heikki Linnakangas (heikki) New status: Ready for Committer
2023-06-10 15:08:37 Peter Eisentraut (petere) Changed authors to Peter Eisentraut (petere)
2023-06-10 15:08:29 Peter Eisentraut (petere) Attached mail thread f9b480b5-e473-d2d1-223a-4b9db30a229a@eisentraut.org
2023-06-10 15:08:29 Peter Eisentraut (petere) Created patch record