CI: adjust test to new rootfs image
@@ -199,7 +199,7 @@ def _send_data_g2h(ssh_connection, host_ip, host_port, iterations, data,
" exit(1)\n" \
"send_iterations={}\n" \
"while send_iterations > 0:\n" \
- " s.sendall('{}')\n" \
+ " s.sendall(b'{}')\n" \
" send_iterations -= 1\n" \
"s.close()"
