message: sync with java in RequestExecutor.FirstTopologyUpdate check for 'initialUrls.Length == 0' is redundant
diff: @@ -586,12 +586,6 @@ export class RequestExecutor implements IDisposable {
  throw error;
  }
  - if (initialUrls.length === 0) {
  - this._lastKnownUrls = initialUrls;
  - throwError("InvalidOperationException",
  - `Cannot get topology from server: ${url}.`, error);
  - }
  -
  topologyUpdateErrors.push({ url, error });
  return false;
  }
  