pytest: Fix flakiness in test_feerate_stress.

We occasionally get a temporary_channel_failure too.

Signed-off-by: Rusty Russell <rusty@rustcorp.com.au>

tests/test_connection.py

@@ -2193,10 +2193,10 @@ def test_feerate_stress(node_factory, executor):
 
     # Make sure it's reconnected, and wait for last payment.
     wait_for(lambda: l1.rpc.getpeer(l2.info['id'])['connected'])
-    # We can get temporary NODE_
-    with pytest.raises(RpcError, match='WIRE_INCORRECT_OR_UNKNOWN_PAYMENT_DETAILS'):
+    # We can get TEMPORARY_CHANNEL_FAILURE due to disconnect, too.
+    with pytest.raises(RpcError, match='WIRE_INCORRECT_OR_UNKNOWN_PAYMENT_DETAILS|WIRE_TEMPORARY_CHANNEL_FAILURE'):
         l1.rpc.waitsendpay("{:064x}".format(l1done - 1))
-    with pytest.raises(RpcError, match='WIRE_INCORRECT_OR_UNKNOWN_PAYMENT_DETAILS'):
+    with pytest.raises(RpcError, match='WIRE_INCORRECT_OR_UNKNOWN_PAYMENT_DETAILS|WIRE_TEMPORARY_CHANNEL_FAILURE'):
         l2.rpc.waitsendpay("{:064x}".format(l2done - 1))
     l1.rpc.call('dev-feerate', [l2.info['id'], rate - 5])
     assert not l1.daemon.is_in_log('Bad.*signature')