message: update debug message for MetricsCommand
diff: @@ -29,7 +29,7 @@ impl MetricsCommandExecutor {
  let res = serde_json::to_string(&metrics_map).unwrap();
  trace!("_collect <<< res: {:?}", res);
  - debug!("collecting metrics from the current thread");
  + debug!("collecting metrics from command thread");
  Ok(res)
  }
  