Unify the server and plugin versions of the generators

pkg/analysis_server/test/src/plugin/result_converter_test.dart

 // Copyright (c) 2017, 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.
 
-import 'package:analysis_server/plugin/protocol/protocol.dart' as server;
+import 'package:analysis_server/protocol/protocol_generated.dart' as server;
 import 'package:analysis_server/src/plugin/result_converter.dart';
 import 'package:analysis_server/src/protocol/protocol_internal.dart' as server;
 import 'package:analyzer_plugin/protocol/protocol_generated.dart' as plugin;
 import 'package:test/test.dart';
 import 'package:test_reflective_loader/test_reflective_loader.dart';
 
 import 'protocol_test_utilities.dart';
 
 main() {
   defineReflectiveSuite(() {
@@ skipping 309 matching lines @@
       expect(converter.convertRefactoringKind(pluginKind), serverKind);
     });
   }
 
   void test_convertSourceChange() {
     plugin.SourceChange initial = pluginSourceChange(0, 0);
     server.SourceChange expected = serverSourceChange(0, 0);
     expect(converter.convertSourceChange(initial), expected);
   }
 }