Do not under any conditions allow that panel to be energized without bonding the grounded conductor to the equipment grounding conductors and grounding electrode conductor in the second building. Without this bond there is no fault clearing path and all conductive itmes conected to the electrical system would become hot if there was a ground fault. There is no way to clear this ground fault without the bond. This would be a very very dangerous installation if the bond is omitted. If you are a contractor, you are still subject to law suits if someone got hurt or killed even if the inspector told you not to bond the neutral.