[FIX] mrp: relax asserts on date

This commit relax, by one second, two datetimes comparison regarding
workorder planning to avoid any false positives

closes odoo/odoo#33740

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

addons/mrp/tests/test_workorder_operation.py

@@ -863,8 +863,8 @@ class TestWorkOrderProcess(TestMrpCommon):
         workorder = production_table.workorder_ids[0]
 
         # Check that the workorder is planned now and that it lasts one hour
-        self.assertEqual(workorder.date_planned_start, date_start, msg="Workorder should be planned tomorrow.")
-        self.assertEqual(workorder.date_planned_finished, date_start + timedelta(hours=1), msg="Workorder should be done one hour later.")
+        self.assertAlmostEqual(workorder.date_planned_start, date_start, delta=timedelta(seconds=1), msg="Workorder should be planned tomorrow.")
+        self.assertAlmostEqual(workorder.date_planned_finished, date_start + timedelta(hours=1), delta=timedelta(seconds=1), msg="Workorder should be done one hour later.")
 
     def test_planning_0(self):
         """ Test alternative conditions