Make server use the common protocol classes

pkg/analysis_server/test/analysis/reanalyze_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.
 
-library test.analysis.reanalyze;
-
 import 'package:analysis_server/protocol/protocol.dart';
 import 'package:analysis_server/protocol/protocol_generated.dart';
 import 'package:analysis_server/src/constants.dart';
 import 'package:analyzer/src/generated/engine.dart';
+import 'package:analyzer_plugin/protocol/protocol_common.dart';
 import 'package:test/test.dart';
 import 'package:test_reflective_loader/test_reflective_loader.dart';
 
 import '../analysis_abstract.dart';
 
 main() {
   defineReflectiveSuite(() {
     defineReflectiveTests(ReanalyzeTest);
   });
 }
@@ skipping 55 matching lines @@
 
   test_sentToPlugins() async {
     createProject();
     await waitForTasksFinished();
     Request request = new Request("0", ANALYSIS_REANALYZE);
     handleSuccessfulRequest(request);
     // verify
     expect(pluginManager.broadcastedRequest, isNotNull);
   }
 }