Fix compilation error for older gcc

[sbera87]

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[sbiscigl]

so something i cant help but notice is that that JsonErrorMarshallerQueryCompatible::Marshall and JsonErrorMarshaller::Marshall are more or less copy and pasted code, which is why you have to invoke the parent class of JsonErrorMarshaller. instead we should try to make this more DRY and not have copy and pasted code and this eliminates the need for the child class to access the parents class, parent class. i.e. we could make a inherited callback.

struct Error{};
struct Response{};

class JsonSerializer {
public:
  Error Marshall(Response response) {
    auto error = ParseResponse(response);
    inheritedCallbacks(error, response);
    return error;
  }

protected:
  std::function<void(Error& error, Response& response)> inheritedCallbacks{};
private:
  Error ParseResponse(Response response);
};

class JsonQueryCompatible : public JsonSerializer {
public:
  JsonQueryCompatible() {
    inheritedCallbacks = [](Error& error, Response& response) {
      //custom error parsing
    };
  }
}

this way we avoid parsing something twice, and we contain the new code to ONLY be the bit about query compatible traits