Fix scheduled_server_test to not timeout-fail.

pkg/scheduled_test/lib/src/scheduled_server/safe_http_server.dart

Index: pkg/scheduled_test/lib/src/scheduled_server/safe_http_server.dart
diff --git a/pkg/scheduled_test/lib/src/scheduled_server/safe_http_server.dart b/pkg/scheduled_test/lib/src/scheduled_server/safe_http_server.dart
index 4c38e113edcb396355b6caedc18eccdfefb77f5c..a916c1d84daf7dffd402525617f06f48d6c73885 100644
--- a/pkg/scheduled_test/lib/src/scheduled_server/safe_http_server.dart
+++ b/pkg/scheduled_test/lib/src/scheduled_server/safe_http_server.dart
@@ -30,7 +30,7 @@ class SafeHttpServer extends StreamView<HttpRequest> implements HttpServer {
       : super(server),
         _inner = server;
 
-  Future close() => _inner.close();
+  Future close({bool force: false}) => _inner.close(force: force);
 
   int get port => _inner.port;