answer select_best_model writes json to correct path

answer_classifier_cached_features/select_best_model.py

@@ -306,7 +306,7 @@ if __name__=='__main__':
     for model_path, model_number in model_paths:
         results_json = os.path.join(
             constants.answer_output_dir,
-            'eval_' + constants.answer_eval_on + '_results_' + str(model_number) + '.json')
+            'eval_train_subset' + '_results_' + str(model_number) + '.json')
         accuracy = eval_model(model_path, results_json)
         line = model_path + '\t' + str(accuracy)
         print line