Relocate service library tests and hookup a working status file

runtime/observatory/tests/service/classes_test.dart

 // Copyright (c) 2014, 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.
 // VMOptions=--compile-all --error_on_bad_type --error_on_bad_override --checked
 
 import 'package:observatory/service_io.dart';
 import 'package:unittest/unittest.dart';
 import 'test_helper.dart';
 
 var tests = [
 
 (Isolate isolate) =>
   isolate.getClassHierarchy().then((Class o) {
     expect(o.name, equals('Object'));
 }),
 
 (Isolate isolate) =>
   isolate.getObject('classes/62').then((Class c) {
     expect(c.name, equals('_ImmutableList'));
     expect(c.vmCid, equals(62));
 }),
 
 
 ];
 
 main(args) => runIsolateTests(args, tests);