Move Index and IndexStore implementations into Engine.

pkg/analyzer/test/index/store/test_all.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.
 
-library test.index.store;
+library test.engine.src.index.store;
 
 import 'package:unittest/unittest.dart';
 
 import 'codec_test.dart' as codec_test;
 import 'collection_test.dart' as collection_test;
 import 'separate_file_manager_test.dart' as separate_file_manager_test;
 import 'split_store_test.dart' as split_store_test;
 
 
 /**
  * Utility for manually running all tests.
  */
 main() {
   groupSep = ' | ';
   group('store', () {
     codec_test.main();
     collection_test.main();
     separate_file_manager_test.main();
     split_store_test.main();
   });
 }