Clean up package imports and library names

pkg/analyzer/test/cancelable_future_test.dart

 // Copyright (c) 2014, 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.cancelable_future;
+library analyzer.test.cancelable_future_test;
 
 import 'dart:async';
 
 import 'package:analyzer/src/cancelable_future.dart';
 import 'package:unittest/unittest.dart';
 import 'package:watcher/src/utils.dart';
 
 import 'reflective_tests.dart';
 import 'utils.dart';
 
@@ skipping 386 matching lines @@
 
   Future test_value() {
     Object obj = new Object();
     return new CancelableFuture.value(obj).then((result) {
       expect(result, same(obj));
     }, onError: (error) {
       fail('Expected successful completion');
     });
   }
 }