message: test_retire_primary requires at least 1 killable node
diff: @@ -100,7 +100,7 @@ def test_retire_backup(network, args):
  @reqs.description("Retiring the primary")
  -@reqs.at_least_n_nodes(3)
  +@reqs.can_kill_n_nodes(1)
  def test_retire_primary(network, args):
  primary, backup = network.find_primary_and_any_backup()
  network.consortium.retire_node(primary, primary)
  