Fix bug in makewalls where y and z were swapped
Fix bug in makewalls where y and z were swapped

UNH-CORE/RM2-CACTUS,petebachant/RM2-CACTUS,UNH-CORE/RM2-CACTUS,petebachant/RM2-CACTUS,UNH-CORE/RM2-CACTUS,petebachant/RM2-CACTUS