[FIX] Empty buffer on PO line when receiving in 2 steps

[max3903]

@guewen, @jbeficent, @lreficent, @jgrandguillaume If you have a better way to solve this, I am open to suggestions.

[JordiBForgeFlow]

I think that the approach of this PR is not the right one. You should define a separate module in OCA/stock-logistics-workflow called 'stock_orderpoint_purchase_link'.

Then define in purchase.order.line a field 'orderpoint_ids' as many2many. Then pass on the orderpoint from the procurement rule. Equivalent to what we did with stock requests here:

• https://github.com/OCA/stock-logistics-warehouse/blob/11.0/stock_request_purchase/models/procurement_rule.py
• https://github.com/OCA/stock-logistics-warehouse/blob/11.0/stock_request_purchase/models/purchase_order_line.py#L11

[JordiBForgeFlow]

Then, add to the ddmrp this new module as dependency, and benefit from the orderpoint_ids now available in the PO line to obtain the execution_priority_level

[LoisRForgeFlow]

I have adapted this as per the new approach see https://github.com/Eficent/ddmrp/pull/63