Pull in test_reflective_loader 0.0.4 and switch analyzer to it.

pkg/analyzer/test/instrumentation/instrumentation_test.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 analyzer.test.instrumentation.instrumentation_test;
 
 import 'dart:async';
 
 import 'package:analyzer/instrumentation/instrumentation.dart';
+import 'package:test_reflective_loader/test_reflective_loader.dart';
 import 'package:unittest/unittest.dart';
 
-import '../reflective_tests.dart';
-
 main() {
   group('instrumentation', () {
-    runReflectiveTests(InstrumentationServiceTest);
-    runReflectiveTests(MulticastInstrumentationServerTest);
+    defineReflectiveTests(InstrumentationServiceTest);
+    defineReflectiveTests(MulticastInstrumentationServerTest);
   });
 }
 
 @reflectiveTest
 class InstrumentationServiceTest {
   void assertNormal(
       TestInstrumentationServer server, String tag, String message) {
     String sent = server.normalChannel.toString();
     if (!sent.endsWith(':$tag:$message\n')) {
       fail('Expected "...:$tag:$message", found "$sent"');
@@ skipping 145 matching lines @@
   @override
   void logWithPriority(String message) {
     priorityChannel.writeln(message);
   }
 
   @override
   Future shutdown() async {
     // Ignored
   }
 }