Only force reconfig for old app versions

See merge request !1998
6 jobs for master in 0 seconds
Status Job ID Name Coverage
  External
failed ERP5.CodingStyleTest-Master

01:43:55

failed ERP5.PerformanceTest-Master

00:35:03

failed ERP5.UnitTest-Master

04:06:00

passed SlapOS.Eggs.UnitTest-Master.Python2

00:26:13

passed SlapOS.Eggs.UnitTest-Master.Python3

00:26:23

passed Wendelin.UnitTest-Master

00:42:04