Switch analysis_server to use 'package:test'.

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

Index: pkg/analysis_server/test/integration/analysis/get_hover_test.dart
diff --git a/pkg/analysis_server/test/integration/analysis/get_hover_test.dart b/pkg/analysis_server/test/integration/analysis/get_hover_test.dart
index 7ed29893408ddbf08a8cd2e88419436edd32af37..b6bcc89e2f6894e50c2a185e71c6215cf24ef1ca 100644
--- a/pkg/analysis_server/test/integration/analysis/get_hover_test.dart
+++ b/pkg/analysis_server/test/integration/analysis/get_hover_test.dart
@@ -8,15 +8,17 @@ import 'dart:async';
 
 import 'package:analysis_server/plugin/protocol/protocol.dart';
 import 'package:path/path.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(AnalysisGetHoverIntegrationTest);
+  defineReflectiveSuite(() {
+    defineReflectiveTests(AnalysisGetHoverIntegrationTest);
+  });
 }
 
 @reflectiveTest