Clean up package imports and library names

pkg/analyzer/test/source/test_all.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.source;
+library analyzer.test.source.test_all;
 
 import 'package:unittest/unittest.dart';
 
 import '../utils.dart';
 import 'analysis_options_provider_test.dart' as analysis_options_provider_test;
 import 'embedder_test.dart' as embedder_test;
 import 'package_map_provider_test.dart' as package_map_provider_test;
 import 'package_map_resolver_test.dart' as package_map_resolver_test;
 import 'path_filter_test.dart' as path_filter_test;
 import 'sdk_ext_test.dart' as sdk_ext_test;
 
 /// Utility for manually running all tests.
 main() {
   initializeTestEnvironment();
   group('source', () {
     analysis_options_provider_test.main();
     embedder_test.main();
     package_map_provider_test.main();
     package_map_resolver_test.main();
     path_filter_test.main();
     sdk_ext_test.main();
   });
 }