message: chore: Suppress ckb init warnings in integration test
  Only print the stderr when the command fails.
diff: @@ -430,7 +430,7 @@ impl Node {
  let rpc_port = format!("{}", self.rpc_port).to_string();
  let p2p_port = format!("{}", self.p2p_port).to_string();
  - let init_exit_status = Command::new(self.binary.to_owned())
  + let init_output = Command::new(self.binary.to_owned())
  .args(&[
  "-C",
  self.working_dir(),
  @@ -442,10 +442,10 @@ impl Node {
  "--p2p-port",
  &p2p_port,
  ])
  - .stdout(Stdio::null())
  - .status()?;
  + .output()?;
  - if !init_exit_status.success() {
  + if !init_output.status.success() {
  + log::error!("{}", String::from_utf8_lossy(init_output.stderr.as_slice()));
  return Err(failure::err_msg("Fail to execute ckb init"));
  }
  