message: [management] Do not enable any discovery for validators
  Closes:
  Approved by: zekun000
diff: @@ -70,7 +70,7 @@ fn smoke_test() {
  let mut config = NodeConfig::default();
  let mut network = NetworkConfig::default();
  - network.discovery_method = DiscoveryMethod::Onchain;
  + network.discovery_method = DiscoveryMethod::None;
  config.validator_network = Some(network);
  let mut network = NetworkConfig::default();
  