obs/slapos: fix use shorter name

fixup for 203927d9
12 jobs for master in 0 seconds (queued for 5 seconds)
Status Job ID Name Coverage
  External
passed ERP5.StandaloneDeploymentScriptTest-Debian.Bullseye

00:38:23

passed ERP5.StandaloneDeploymentScriptTest-Debian.Buster

00:34:41

passed SlapOS-Master.StandaloneDeploymentScriptTest-Debian.Bullseye

00:40:13

failed SlapOS-Master.StandaloneDeploymentScriptTest-Debian.Buster

15:02:01

passed Wendelin.StandaloneDeploymentScriptTest-Debian.Bullseye

00:39:23

passed Wendelin.StandaloneDeploymentScriptTest-Debian.Buster

00:33:36

failed Wendelin.StandaloneDeploymentScriptTest-Debian.Buster.Master

15:02:36

passed ERP5.StandaloneDeploymentScriptTest-Debian.Bullseye

00:37:19

passed ERP5.StandaloneDeploymentScriptTest-Debian.Buster

00:30:40

passed SlapOS-Master.StandaloneDeploymentScriptTest-Debian.Bullseye

00:36:42

passed Wendelin.StandaloneDeploymentScriptTest-Debian.Bullseye

00:36:19

passed Wendelin.StandaloneDeploymentScriptTest-Debian.Buster

00:33:02