Migrate first block of tests in standalone to standalone_2

tests/standalone/http_launch_data/http_spawn_main.dart

-// Copyright (c) 2013, the Dart project authors.  Please see the AUTHORS file
-// for details. All rights reserved. Use of this source code is governed by a
-// BSD-style license that can be found in the LICENSE file.
-
-library http_launch_main;
-
-import 'dart:isolate';
-import 'dart:io';
-
-main(List<String> arguments) {
-  int port = int.parse(arguments[0]);
-  ReceivePort receivePort = new ReceivePort();
-  Isolate.spawnUri(Uri.parse('http://127.0.0.1:$port/http_isolate_main.dart'),
-      ['hello'], receivePort.sendPort);
-  receivePort.first.then((response) {
-    print(response);
-  });
-}