slapos_crm: Display age of the message at the report

4 jobs for master in 0 seconds
Status Job ID Name Coverage
  External
failed SlapOS.Eggs.UnitTest-Master.Python2

00:19:39

failed SlapOS.Eggs.UnitTest-Master.Python3

00:13:57

failed SlapOS.Eggs.UnitTest-Master.Python2

00:21:56

failed SlapOS.Eggs.UnitTest-Master.Python3

00:21:33