Add AnalysisSession to analyzer

pkg/analyzer/test/src/dart/analysis/test_all.dart

 // Copyright (c) 2016, 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 analyzer.test.src.dart.analysis.test_all;
 
 import 'package:test_reflective_loader/test_reflective_loader.dart';
 
 import 'driver_test.dart' as driver;
 import 'file_state_test.dart' as file_state;
 import 'index_test.dart' as index;
 import 'referenced_names_test.dart' as referenced_names;
 import 'search_test.dart' as search_test;
+import 'session_test.dart' as session_test;
 
 /// Utility for manually running all tests.
 main() {
   defineReflectiveSuite(() {
     driver.main();
     file_state.main();
     index.main();
     referenced_names.main();
     search_test.main();
+    session_test.main();
   }, name: 'analysis');
 }