Unify the server and plugin versions of the generators

pkg/analysis_server/test/domain_analysis_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.domain.analysis;
-
 import 'dart:async';
 
-import 'package:analysis_server/plugin/protocol/protocol.dart';
+import 'package:analysis_server/protocol/protocol.dart';
+import 'package:analysis_server/protocol/protocol_generated.dart';
 import 'package:analysis_server/src/analysis_server.dart';
 import 'package:analysis_server/src/constants.dart';
 import 'package:analysis_server/src/domain_analysis.dart';
 import 'package:analysis_server/src/plugin/server_plugin.dart';
 import 'package:analyzer/file_system/memory_file_system.dart';
 import 'package:analyzer/instrumentation/instrumentation.dart';
 import 'package:analyzer/src/generated/engine.dart';
 import 'package:analyzer/src/generated/sdk.dart';
 import 'package:analyzer_plugin/protocol/protocol_generated.dart' as plugin;
 import 'package:plugin/manager.dart';
@@ skipping 790 matching lines @@
     plugin.AnalysisSetSubscriptionsParams params =
         pluginManager.analysisSetSubscriptionsParams;
     expect(params, isNotNull);
     Map<plugin.AnalysisService, List<String>> subscriptions =
         params.subscriptions;
     expect(subscriptions, hasLength(1));
     List<String> files = subscriptions[plugin.AnalysisService.HIGHLIGHTS];
     expect(files, [testFile]);
   }
 }