pkg/test: put super call last

lib/src/runner/runner_suite.dart

Index: lib/src/runner/runner_suite.dart
diff --git a/lib/src/runner/runner_suite.dart b/lib/src/runner/runner_suite.dart
index e53bf1f51c5f86ca05dc59a448773262ae57d615..fe6090c46487b6b69e20d314f91c0326e26ecf28 100644
--- a/lib/src/runner/runner_suite.dart
+++ b/lib/src/runner/runner_suite.dart
@@ -33,8 +33,8 @@ class RunnerSuite extends Suite {
 
   RunnerSuite(this.environment, Group group, {String path,
           TestPlatform platform, OperatingSystem os, AsyncFunction onClose})
-      : super(group, path: path, platform: platform, os: os),
-        _onClose = onClose;
+      : _onClose = onClose,
+        super(group, path: path, platform: platform, os: os);
 
   RunnerSuite filter(bool callback(Test test)) {
     var filtered = group.filter(callback);