testing: fix default path for logrotate files

logrotate stack uses srv/backup/logrotate
10 jobs for fix/logrotate-snapshot in 0 seconds
latest
Status Job ID Name Coverage
  External
canceled SlapOS.SoftwareReleases.IntegrationTest-Jerome-Python3

02:20:25

running SlapOS.SoftwareReleases.IntegrationTest-Jerome-Python3

25222:11:04

running SlapOS.SoftwareReleases.IntegrationTest-Jerome-WIP

25224:41:03

failed SlapOS.SoftwareReleases.IntegrationTest-Jerome-Python3

04:16:52

failed SlapOS.SoftwareReleases.IntegrationTest-Jerome-Python3

03:15:21

canceled SlapOS.SoftwareReleases.IntegrationTest-Jerome-Python3

01:50:15

failed SlapOS.SoftwareReleases.IntegrationTest-Jerome-WIP

05:56:38

failed SlapOS.SoftwareReleases.IntegrationTest-Jerome-WIP

04:25:44

failed SlapOS.SoftwareReleases.IntegrationTest-Jerome-WIP

04:24:46

canceled SlapOS.SoftwareReleases.IntegrationTest-Jerome-WIP