Call feature_id when reporting results

Author: npilon

planterbox/summarize.py

@@ -38,7 +38,7 @@ def summarize_features(self, event, reportable_results):
             sorted(
                 reportable_results,
                 key=(lambda r: (
-                    r.test.feature_id,
+                    r.test.feature_id(),
                     r.exc_info.scenario_index,
                 )),
             ),