[FIX] mrp: start the next workorder in a function to allow for overrides

When a workorder is processed, it starts the next workorder.
We put that logic in a function to allow other modules to override it.

opw 1943674

addons/mrp/models/mrp_workorder.py

@@ -338,8 +338,7 @@ def record_production(self):
                 move_line.done_wo = True
 
         # One a piece is produced, you can launch the next work order
-        if self.next_work_order_id.state == 'pending':
-            self.next_work_order_id.state = 'ready'
+        self._start_nextworkorder()
 
         self.move_line_ids.filtered(
             lambda move_line: not move_line.done_move and not move_line.lot_produced_id and move_line.qty_done > 0
@@ -410,6 +409,12 @@ def record_production(self):
             self.button_finish()
         return True
 
+    @api.multi
+    def _start_nextworkorder(self):
+        for record in self:
+            if record.next_work_order_id.state == 'pending':
+                record.next_work_order_id.state = 'ready'
+
     @api.multi
     def button_start(self):
         self.ensure_one()