Fix compilation errors

Author: azais-corentin

tests/networking_tests/http_server_api_tests/http_server_api_tests.cpp

@@ -1073,7 +1073,7 @@ struct raw_http_client
 
    void close()
    {
-      std::error_code ec;
+      ::asio::error_code ec;
       socket_.shutdown(::asio::ip::tcp::socket::shutdown_both, ec);
       socket_.close(ec);
    }