Unify the server and plugin versions of the generators

pkg/analysis_server/test/completion_test_support.dart

Index: pkg/analysis_server/test/completion_test_support.dart
diff --git a/pkg/analysis_server/test/completion_test_support.dart b/pkg/analysis_server/test/completion_test_support.dart
index 3121980430549830505c673c1ab17f318625ba8e..d352af68e672fb5870cbbd489128d56561db0bea 100644
--- a/pkg/analysis_server/test/completion_test_support.dart
+++ b/pkg/analysis_server/test/completion_test_support.dart
@@ -2,12 +2,10 @@
 // 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.completion.support;
-
 import 'dart:async';
 import 'dart:collection';
 
-import 'package:analysis_server/plugin/protocol/protocol.dart';
+import 'package:analysis_server/protocol/protocol_generated.dart';
 import 'package:test/test.dart';
 
 import 'domain_completion_test.dart';