Slapos master monitoring url update

See merge request !579
5 jobs for master in 0 seconds
Status Job ID Name Coverage
  External
failed SlapOS-Master.UnitTest-Master

01:52:18

passed SlapOS.Eggs.UnitTest-Master.Python2

00:15:26

failed SlapOS.Eggs.UnitTest-Master.Python3

00:16:35

passed SlapOS.Eggs.UnitTest-Master.Python2

00:16:46

failed SlapOS.Eggs.UnitTest-Master.Python3

00:17:00