erp5_test_result: take care of timeouts when we invalidate test nodes

6 jobs for master in 0 seconds
Status Job ID Name Coverage
  External
failed ERP5.CodingStyleTest-Master

03:10:19

failed ERP5.UnitTest-Master

10:07:02

failed SlapOS.Eggs.UnitTest-Master.Python2

01:29:24

failed ERP5.UnitTest-Master

07:50:17

passed SlapOS.Eggs.UnitTest-Master.Python2

02:31:45

passed SlapOS.Eggs.UnitTest-Master.Python2

02:11:52