Python3 Preparations (again)

See merge request !620
4 jobs for master in 0 seconds
Status Job ID Name Coverage
  External
failed SlapOS-Master.UnitTest-Master

01:39:33

failed SlapOS.Eggs.UnitTest-Master.Python2

00:16:11

passed SlapOS.Eggs.UnitTest-Master.Python3

00:26:20

passed SlapOS.Eggs.UnitTest-Master.Python3

00:16:13