Unify the server and plugin versions of the generators

pkg/analysis_server/test/integration/execution/create_context_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:test/test.dart';
 import 'package:test_reflective_loader/test_reflective_loader.dart';
 
-import '../integration_tests.dart';
+import '../support/integration_tests.dart';
 
 main() {
   defineReflectiveSuite(() {
     defineReflectiveTests(CreateContextTest);
   });
 }
 
 @reflectiveTest
 class CreateContextTest extends AbstractAnalysisServerIntegrationTest {
   test_create() async {
     standardAnalysisSetup();
     String contextId =
         (await sendExecutionCreateContext(sourceDirectory.path)).id;
     expect(contextId, isNotNull);
   }
 }