Roll Observatory packages and add a roll script

packages/analyzer/test/src/task/test_all.dart

+// Copyright (c) 2015, 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.src.task.test_all;
+
+import 'package:unittest/unittest.dart';
+
+import '../../utils.dart';
+import 'dart_test.dart' as dart_test;
+import 'dart_work_manager_test.dart' as dart_work_manager_test;
+import 'driver_test.dart' as driver_test;
+import 'general_test.dart' as general_test;
+import 'html_test.dart' as html_test;
+import 'html_work_manager_test.dart' as html_work_manager_test;
+import 'incremental_element_builder_test.dart'
+    as incremental_element_builder_test;
+import 'inputs_test.dart' as inputs_test;
+import 'manager_test.dart' as manager_test;
+import 'model_test.dart' as model_test;
+import 'strong_mode_test.dart' as strong_mode_test;
+
+/// Utility for manually running all tests.
+main() {
+  initializeTestEnvironment();
+  group('task tests', () {
+    dart_test.main();
+    dart_work_manager_test.main();
+    driver_test.main();
+    general_test.main();
+    html_test.main();
+    html_work_manager_test.main();
+    incremental_element_builder_test.main();
+    inputs_test.main();
+    manager_test.main();
+    model_test.main();
+    strong_mode_test.main();
+  });
+}