Refactor service tests in preparation of running on sky_shell

runtime/observatory/tests/service/vm_restart_test.dart

Index: runtime/observatory/tests/service/vm_restart_test.dart
diff --git a/runtime/observatory/tests/service/vm_restart_test.dart b/runtime/observatory/tests/service/vm_restart_test.dart
index 8f5da2ea6b3922498d7f917fbfb19d6279d155cd..605e7bfa9a327e9b740d860ad3f1a8e30d40b2f3 100644
--- a/runtime/observatory/tests/service/vm_restart_test.dart
+++ b/runtime/observatory/tests/service/vm_restart_test.dart
@@ -7,6 +7,7 @@ import 'dart:async';
 import 'dart:developer';
 import 'package:observatory/service_io.dart';
 import 'package:unittest/unittest.dart';
+import 'service_test_common.dart';
 import 'test_helper.dart';
 
 int count = 0;
@@ -69,7 +70,7 @@ var tests = [
         }
       }
     });
-    
+
     Completer restartCompleter = new Completer();
     var isolateStream = await isolate.vm.getEventStream(VM.kIsolateStream);
     var isolateSub;
@@ -101,5 +102,5 @@ var tests = [
   },
 ];
 
-  
+
 main(args) => runIsolateTests(args, tests, testeeConcurrent: test);