slapos_cloud: Minor clean up on test for allow us overwrite methods more easily

7 jobs for master in 0 seconds (queued for 1 second)
Status Job ID Name Coverage
  External
failed SlapOS-Master.UnitTest-Master

01:15:08

passed SlapOS.Eggs.UnitTest-Master.Python2

00:37:34

passed SlapOS.Eggs.UnitTest-Master.Python3

00:17:26

passed SlapOS.Eggs.UnitTest-Master.Python2

00:09:40

passed SlapOS.Eggs.UnitTest-Master.Python2

00:11:31

passed SlapOS.Eggs.UnitTest-Master.Python3

00:23:41

passed SlapOS.Eggs.UnitTest-Master.Python3

00:19:09