message: log warning in setter params for get params
diff: @@ -166,7 +166,7 @@ class SetterParams : public Params {
  auto search_result =
  get_parameter_recursive(map, param_name, default_value);
  if (!search_result.second && log_if_default_) {
  - LOG(FATAL) << "Using default " << default_value << " for param \""
  + LOG(WARNING) << "Using default " << default_value << " for param \""
  << param_name << "\"";
  }
  return search_result.first;
  