[fixed] AIAgent now removes dead/unattackable targets
[fixed] Vehicle is now unattackable when destroyed

Change-Id: I1a4744f3da1fe8087951044c60017c61c37e04b0
[fixed] Vehcile is no longer attackable when destroyed

Change-Id: Ie83770cc679f8096bec64bc0f444ddf79e018945