erp5_project: correct date field's id

match date field id in listbox's column
13 jobs for master in 0 seconds
Status Job ID Name Coverage
  External
passed ERP5.CodingStyleTest-Master

01:29:25

failed ERP5.PerformanceTest-Master

00:24:17

failed ERP5.UnitTest-Master

02:51:51

failed ERP5.UnitTest-Master.Medusa

02:37:31

passed SlapOS.Eggs.UnitTest-Master.Python2

passed SlapOS.Eggs.UnitTest-Master.Python3

00:11:31

passed SlapOS.Eggs.UnitTest-Master.Python2

00:21:29

passed SlapOS.Eggs.UnitTest-Master.Python2

00:17:26

passed SlapOS.Eggs.UnitTest-Master.Python2

00:20:58

passed SlapOS.Eggs.UnitTest-Master.Python2

00:13:00

passed SlapOS.Eggs.UnitTest-Master.Python3

00:17:48

passed SlapOS.Eggs.UnitTest-Master.Python3

00:14:28

passed SlapOS.Eggs.UnitTest-Master.Python3

00:14:17