Switch analysis_server to use 'package:test'.

pkg/analysis_server/test/integration/analysis/lint_test.dart

Index: pkg/analysis_server/test/integration/analysis/lint_test.dart
diff --git a/pkg/analysis_server/test/integration/analysis/lint_test.dart b/pkg/analysis_server/test/integration/analysis/lint_test.dart
index a1cfeb6c1eab779f5fc3184a03c8ac4c6b4bcb84..aacdd632343bdad3813e2983c380ccbc5ad3f91a 100644
--- a/pkg/analysis_server/test/integration/analysis/lint_test.dart
+++ b/pkg/analysis_server/test/integration/analysis/lint_test.dart
@@ -6,15 +6,17 @@ library test.integration.analysis.lint;
 
 import 'package:analysis_server/plugin/protocol/protocol.dart';
 import 'package:analyzer/src/generated/engine.dart';
+import 'package:test/test.dart';
 import 'package:test_reflective_loader/test_reflective_loader.dart';
-import 'package:unittest/unittest.dart';
 
 import '../../utils.dart';
 import '../integration_tests.dart';
 
 main() {
   initializeTestEnvironment();
-  defineReflectiveTests(LintIntegrationTest);
+  defineReflectiveSuite(() {
+    defineReflectiveTests(LintIntegrationTest);
+  });
 }
 
 @reflectiveTest