Whenever the period of suspension expires without revocation of the order, the defendant is relieved of any obligations imposed on him by the order of the court and has satisfied his criminal liability for the crime. He shall thereupon be entitled to a certificate from the court so reciting such facts, and upon presenting the same to the governor, the defendant may, in the discretion of the governor, be granted a pardon or a certificate restoring such person to full rights of citizenship.