Switch analysis_server to use 'package:test'.

pkg/analysis_server/test/services/completion/dart/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.services.completion.dart;
 
-import 'package:unittest/unittest.dart';
+import 'package:test_reflective_loader/test_reflective_loader.dart';
 
 import '../../../utils.dart';
 import 'arglist_contributor_test.dart' as arglist_test;
 import 'combinator_contributor_test.dart' as combinator_test;
 import 'common_usage_sorter_test.dart' as common_usage_test;
 import 'completion_manager_test.dart' as completion_manager;
 import 'field_formal_contributor_test.dart' as field_formal_contributor_test;
 import 'imported_reference_contributor_test.dart' as imported_ref_test;
 import 'inherited_reference_contributor_test.dart' as inherited_ref_test;
 import 'keyword_contributor_test.dart' as keyword_test;
 import 'label_contributor_test.dart' as label_contributor_test;
 import 'library_member_contributor_test.dart' as library_member_test;
 import 'library_prefix_contributor_test.dart' as library_prefix_test;
 import 'local_constructor_contributor_test.dart' as local_constructor_test;
 import 'local_declaration_visitor_test.dart' as local_decl_visitor_test;
 import 'local_library_contributor_test.dart' as local_lib_test;
 import 'local_reference_contributor_test.dart' as local_ref_test;
 import 'named_constructor_contributor_test.dart' as named_contributor_test;
 import 'optype_test.dart' as optype_test;
 import 'override_contributor_test.dart' as override_contributor_test;
 import 'static_member_contributor_test.dart' as static_contributor_test;
 import 'type_member_contributor_test.dart' as type_member_contributor_test;
 import 'uri_contributor_test.dart' as uri_contributor_test;
 import 'variable_name_contributor_test.dart' as variable_name_contributor_test;
 
 /// Utility for manually running all tests.
 main() {
   initializeTestEnvironment();
-  group('dart/completion', () {
+  defineReflectiveSuite(() {
     arglist_test.main();
     combinator_test.main();
     common_usage_test.main();
     completion_manager.main();
     field_formal_contributor_test.main();
     imported_ref_test.main();
     inherited_ref_test.main();
     keyword_test.main();
     label_contributor_test.main();
     library_member_test.main();
     library_prefix_test.main();
     local_constructor_test.main();
     local_decl_visitor_test.main();
     local_lib_test.main();
     local_ref_test.main();
     named_contributor_test.main();
     optype_test.main();
     override_contributor_test.main();
     static_contributor_test.main();
     type_member_contributor_test.main();
     uri_contributor_test.main();
     variable_name_contributor_test.main();
-  });
+  }, name: 'dart');
 }