
This test, just added in commit a924c327e, sometimes fails because the old backend hasn't finished dropping the temporary replication slot when the new backend looks. Borrow the previously-invented methodology for waiting for the old process to disappear from pg_stat_activity. Petr Jelinek Discussion: https://postgr.es/m/62935e6f-4f1b-c433-e0fa-7f936a38b3e5@2ndquadrant.com