[FIX] mrp: set planned date when creating order through procurement

If it isn't set manually, it defaults to now and the result is not
consistent with planned date end. We make it an hour before totally
subjectively.

closes odoo/odoo#37173

Signed-off-by: Simon Lejeune (sle) <sle@openerp.com>

addons/mrp/models/stock_rule.py

@@ -84,6 +84,7 @@ class StockRule(models.Model):
             'bom_id': bom.id,
             'date_deadline': fields.Datetime.to_string(self._get_date_planned(product_id, company_id, values)),
             'date_planned_finished': values['date_planned'],
+            'date_planned_start': values['date_planned'] - relativedelta(hours=1),
             'procurement_group_id': False,
             'propagate_cancel': self.propagate_cancel,
             'propagate_date': self.propagate_date,

addons/mrp/tests/test_procurement.py

@@ -194,5 +194,6 @@ class TestProcurement(TestMrpCommon):
 
         move_dest_scheduled_date = move_dest.date_expected
         mo.date_planned_start += timedelta(days=5)
-
-        self.assertAlmostEqual(move_dest.date_expected, move_dest_scheduled_date + timedelta(days=5), delta=timedelta(seconds=1), msg='date is not propagated')
+        # Adding 5 days to the date planned start makes the next move's date 4 days and 23 hours
+        # later since the date planned start was set one hour before the date_planned_end.
+        self.assertAlmostEqual(move_dest.date_expected, move_dest_scheduled_date + timedelta(days=4, hours=23), delta=timedelta(seconds=1), msg='date is not propagated')