Clean up package imports and library names

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 test.instrumentation;
+library analyzer.test.instrumentation.instrumentation_test;
 
 import 'dart:async';
 
 import 'package:analyzer/instrumentation/instrumentation.dart';
 import 'package:unittest/unittest.dart';
 
 import '../reflective_tests.dart';
 
 main() {
   group('instrumentation', () {
@@ skipping 157 matching lines @@
   @override
   void logWithPriority(String message) {
     priorityChannel.writeln(message);
   }
 
   @override
   Future shutdown() async {
     // Ignored
   }
 }