message: update check status >= 400
diff: @@ -559,7 +559,7 @@ export class AjaxMonitor extends BaseTelemetryPlugin implements IDependenciesPlu
  }
  }
  - if (_self._config.includeResponseErrorData && xhr.status !== 200) {
  + if (_self._config.includeResponseErrorData && xhr.status >= 400) {
  dependency.properties = dependency.properties || {};
  dependency.properties.responseError = xhr.statusText + " - " + xhr.responseText;
  }
  