Switch analysis_server to use 'package:test'.

pkg/analysis_server/test/services/dependencies/library_dependencies_test.dart

 // Copyright (c) 2015, 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.dependencies.library;
 
 import 'package:analysis_server/src/services/dependencies/library_dependencies.dart';
+import 'package:test/test.dart';
 import 'package:test_reflective_loader/test_reflective_loader.dart';
-import 'package:unittest/unittest.dart';
 
 import '../../abstract_context.dart';
 import '../../utils.dart';
 
 main() {
   initializeTestEnvironment();
-  defineReflectiveTests(LibraryDependenciesTest);
+  defineReflectiveSuite(() {
+    defineReflectiveTests(LibraryDependenciesTest);
+  });
 }
 
 @reflectiveTest
 class LibraryDependenciesTest extends AbstractContextTest {
   test_LibraryDependencies() {
     addSource('/lib1.dart', 'import "lib2.dart";');
     addSource('/lib2.dart', 'import "lib1.dart";');
     addSource('/lib3.dart', 'import "lib2.dart";');
     addSource('/lib4.dart', 'import "lib5.dart";');
     provider.newFile('/lib5.dart', 'import "lib6.dart";');
@@ skipping 17 matching lines @@
   }
 
   test_PackageMaps() {
     //TODO(pquitslund): add test
   }
 
   void _performAnalysis() {
     while (context.performAnalysisTask().hasMoreWork);
   }
 }