fix purchase_requisition PO generation
fix purchase_requisition PO generation

the PO is generated with a location_id computed from the route
default_location_dest_id. For dropshipping we need this to be outgoing transit.

yvaucher/stock-logistics-transport,xpansa/stock-logistics-transport,Endika/stock-logistics-transport,open-synergy/stock-logistics-transport,Antiun/stock-logistics-transport