Switch analysis_server to use 'package:test'.

pkg/analysis_server/test/search/test_all.dart

Index: pkg/analysis_server/test/search/test_all.dart
diff --git a/pkg/analysis_server/test/search/test_all.dart b/pkg/analysis_server/test/search/test_all.dart
index fc5de319c695dc55aadf9229decef40b98bcdef1..22f710c1f420ec7a620d2ce232497e6c76763e13 100644
--- a/pkg/analysis_server/test/search/test_all.dart
+++ b/pkg/analysis_server/test/search/test_all.dart
@@ -3,7 +3,7 @@
 // BSD-style license that can be found in the LICENSE file.
 library test.search;
 
-import 'package:unittest/unittest.dart';
+import 'package:test_reflective_loader/test_reflective_loader.dart';
 
 import '../utils.dart';
 import 'element_references_test.dart' as element_references_test;
@@ -18,12 +18,12 @@ import 'type_hierarchy_test.dart' as type_hierarchy_test;
  */
 main() {
   initializeTestEnvironment();
-  group('search', () {
+  defineReflectiveSuite(() {
     element_references_test.main();
     member_declarations.main();
     member_references_test.main();
     search_result_test.main();
     top_level_declarations_test.main();
     type_hierarchy_test.main();
-  });
+  }, name: 'search');
 }