software/erp5testnode/testsuite: use same branch when installing software in slaprunner

Instead of installing the software inside slaprunner from 1.0 branch, use the
same branch as the tested one, this should allow to see regressions earlier
(before they got merged in 1.0)
8 jobs for feat/theia-up in 0 seconds
Status Job ID Name Coverage
  External
passed SlapOS.SlapRunner.ResilienceTest-Master

00:30:55

failed SlapOS.SlapRunner.ResilienceTest-Master.ERP5

00:09:19

failed SlapOS.SoftwareReleases.IntegrationTest-Master.Python2

04:42:50

passed SlapOS.SoftwareReleases.IntegrationTest-Master.Python3

01:21:55

passed SlapOS.SlapRunner.ResilienceTest-Master

00:29:53

passed SlapOS.SlapRunner.ResilienceTest-Master

00:30:31

failed SlapOS.SlapRunner.ResilienceTest-Master.ERP5

00:09:18

failed SlapOS.SlapRunner.ResilienceTest-Master.ERP5

00:08:31