Rusty Russell
3c3788a241
pytest: fix test_xpay_fake_channeld flake
Also, resulting log was huge, so suppress log level (will probably speed test)
```
2025-09-02T06:01:39.4881086Z > l1.rpc.plugin_start(os.path.join(os.getcwd(), 'plugins/cln-askrene'))
2025-09-02T06:01:39.4881090Z
2025-09-02T06:01:39.4881174Z tests/test_xpay.py:279:
...
2025-09-02T06:01:39.4883193Z > self.sock.connect(str(self.path))
2025-09-02T06:01:39.4883340Z E ConnectionRefusedError: [Errno 111] Connection refused
...
2025-09-02T06:01:41.7767610Z lightningd-1 2025-09-02T06:01:27.235Z **BROKEN** plugin-cln-xpay: askrene-age failed with {"code":-4, "message":"Plugin terminated before replying to RPC call."}
2025-09-02T06:01:41.7768127Z lightningd-1 2025-09-02T06:01:27.305Z INFO plugin-cln-xpay: Killing plugin: exited during normal operation
```
Signed-off-by: Rusty Russell <rusty@rustcorp.com.au>