[FIX] mrp: load move_finished_ids in view

Issue: open a done production. Unlock it. Add a new raw stock move.
This action will called _compute_order_finished_lot_ids on the new
stock_move. This method uses
move.raw_material_production_id.move_finished_ids.
raw_material_production_id is available but not move_finished_ids. The
reason is move_finished_id is not loaded by the web client in the
production form view.

This commit added the one2many (invisible) in the view in order to
get all the information in the compute method.

addons/mrp/views/mrp_production_views.xml

@@ -177,6 +177,7 @@
                             <field name="move_raw_ids" context="{'final_lots': show_final_lots, 'tree_view_ref': 'mrp.view_stock_move_raw_tree', 'form_view_ref': 'mrp.view_stock_move_lots', 'default_location_id': location_src_id, 'default_location_dest_id': production_location_id, 'default_state': 'draft', 'default_raw_material_production_id': id, 'default_picking_type_id': picking_type_id}" attrs="{'readonly': ['&amp;', ('state', '!=', 'draft'), ('is_locked', '=', True)]}"/>
                         </page>
                         <page string="Finished Products">
+                            <field name="move_finished_ids" invisible="1"/>
                             <field name="finished_move_line_ids" context="{'form_view_ref': 'mrp.view_finisehd_move_line'}" attrs="{'readonly': [('is_locked', '=', True)], 'invisible': [('finished_move_line_ids', '=', [])]}">
                                  <tree default_order="done_move" editable="bottom" create="0" delete="0" decoration-muted="state in ('done', 'cancel')">
                                     <field name="product_id" readonly="1"/>