Testnode: Use shared parts when building softwares

/reviewed-on !627
6 jobs for 1.0
Status Job ID Name Coverage
  External
passed SlapOS.SlapRunner.ResilienceTest-Master

00:24:33

failed SlapOS.SlapRunner.ResilienceTest-Master.ERP5

01:49:05

canceled SlapOS.SoftwareReleases.IntegrationTest-Master

25:00:43

failed SlapOS.SlapRunner.ResilienceTest-Master.ERP5

failed SlapOS.SoftwareReleases.IntegrationTest-Master

10:58:51

failed SlapOS.SoftwareReleases.IntegrationTest-Master

05:28:40