Unify the server and plugin versions of the generators

pkg/analysis_server/test/services/correction/sort_members_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.services.refactoring.sort_members;
-
-import 'package:analysis_server/plugin/protocol/protocol.dart';
+import 'package:analysis_server/protocol/protocol_generated.dart';
 import 'package:analysis_server/src/services/correction/sort_members.dart';
 import 'package:test/test.dart';
 import 'package:test_reflective_loader/test_reflective_loader.dart';
 
 import '../../abstract_single_unit.dart';
 
 main() {
   defineReflectiveSuite(() {
     defineReflectiveTests(SortMembersTest);
   });
@@ skipping 781 matching lines @@
     List<SourceEdit> edits = sorter.sort();
     String result = SourceEdit.applySequence(testCode, edits);
     expect(result, expectedCode);
   }
 
   void _parseTestUnit(String code) {
     addTestSource(code);
     testUnit = context.parseCompilationUnit(testSource);
   }
 }