obs/slapos: fix use shorter name

fixup for 203927d9

The old dsc was not removed correctly
40 jobs for master in 0 seconds
Status Job ID Name Coverage
  External
failed ERP5.StandaloneDeploymentScriptTest-Debian.Buster

15:07:55

failed ERP5.StandaloneDeploymentScriptTest-Debian.Buster.Master

15:03:00

failed ERP5.StandaloneDeploymentScriptTest-Debian.Stretch

15:02:59

failed SlapOS-Master.StandaloneDeploymentScriptTest-Debian.Buster

15:03:02

failed SlapOS-Master.StandaloneDeploymentScriptTest-Debian.Stretch

15:02:45

failed Wendelin.StandaloneDeploymentScriptTest-Debian.Buster

15:04:36

failed Wendelin.StandaloneDeploymentScriptTest-Debian.Buster.Master

15:02:55

failed Wendelin.StandaloneDeploymentScriptTest-Debian.Stretch

15:02:53

failed ERP5.StandaloneDeploymentScriptTest-Debian.Buster

15:02:55

failed ERP5.StandaloneDeploymentScriptTest-Debian.Buster

15:10:20

failed ERP5.StandaloneDeploymentScriptTest-Debian.Buster

15:08:01

failed ERP5.StandaloneDeploymentScriptTest-Debian.Buster

15:02:47

failed ERP5.StandaloneDeploymentScriptTest-Debian.Buster.Master

15:03:16

failed ERP5.StandaloneDeploymentScriptTest-Debian.Buster.Master

15:02:57

failed ERP5.StandaloneDeploymentScriptTest-Debian.Buster.Master

15:02:53

failed ERP5.StandaloneDeploymentScriptTest-Debian.Buster.Master

15:03:09

failed ERP5.StandaloneDeploymentScriptTest-Debian.Stretch

15:03:03

failed ERP5.StandaloneDeploymentScriptTest-Debian.Stretch

15:03:32

failed ERP5.StandaloneDeploymentScriptTest-Debian.Stretch

15:03:05

failed ERP5.StandaloneDeploymentScriptTest-Debian.Stretch

15:03:58

failed SlapOS-Master.StandaloneDeploymentScriptTest-Debian.Buster

15:03:22

failed SlapOS-Master.StandaloneDeploymentScriptTest-Debian.Buster

15:03:14

failed SlapOS-Master.StandaloneDeploymentScriptTest-Debian.Buster

15:03:07

failed SlapOS-Master.StandaloneDeploymentScriptTest-Debian.Buster

15:03:02

failed SlapOS-Master.StandaloneDeploymentScriptTest-Debian.Stretch

15:03:26

failed SlapOS-Master.StandaloneDeploymentScriptTest-Debian.Stretch

15:02:41

failed SlapOS-Master.StandaloneDeploymentScriptTest-Debian.Stretch

15:02:48

failed SlapOS-Master.StandaloneDeploymentScriptTest-Debian.Stretch

15:03:06

failed Wendelin.StandaloneDeploymentScriptTest-Debian.Buster

15:03:24

failed Wendelin.StandaloneDeploymentScriptTest-Debian.Buster

15:03:15

failed Wendelin.StandaloneDeploymentScriptTest-Debian.Buster

15:03:50

failed Wendelin.StandaloneDeploymentScriptTest-Debian.Buster

15:03:47

failed Wendelin.StandaloneDeploymentScriptTest-Debian.Buster.Master

15:03:18

failed Wendelin.StandaloneDeploymentScriptTest-Debian.Buster.Master

15:03:32

failed Wendelin.StandaloneDeploymentScriptTest-Debian.Buster.Master

15:02:56

failed Wendelin.StandaloneDeploymentScriptTest-Debian.Buster.Master

15:02:53

failed Wendelin.StandaloneDeploymentScriptTest-Debian.Stretch

15:02:51

failed Wendelin.StandaloneDeploymentScriptTest-Debian.Stretch

15:02:59

failed Wendelin.StandaloneDeploymentScriptTest-Debian.Stretch

15:02:36

failed Wendelin.StandaloneDeploymentScriptTest-Debian.Stretch

15:02:45