monitor: Ensure internal safety of section names

Slave reference can be dangerous for buildout validity or file names.
10 jobs for feature/edgetest-pop in 0 seconds
Status Job ID Name Coverage
  External
passed SlapOS.SoftwareReleases.IntegrationTest-py3-luke/feature/edgetest-pop

00:39:01

passed SlapOS.SoftwareReleases.IntegrationTest-py3-luke/feature/edgetest-pop

01:10:08

passed SlapOS.SoftwareReleases.IntegrationTest-py3-luke/feature/edgetest-pop

00:31:02

failed SlapOS.SoftwareReleases.IntegrationTest-py3-luke/feature/edgetest-pop

00:28:41

passed SlapOS.SoftwareReleases.IntegrationTest-py3-luke/feature/edgetest-pop

00:26:53

passed SlapOS.SoftwareReleases.IntegrationTest-py3-luke/feature/edgetest-pop

00:29:21

passed SlapOS.SoftwareReleases.IntegrationTest-py3-luke/feature/edgetest-pop

00:27:49

failed SlapOS.SoftwareReleases.IntegrationTest-py3-luke/feature/edgetest-pop

00:24:56

passed SlapOS.SoftwareReleases.IntegrationTest-py3-luke/feature/edgetest-pop

00:34:20

passed SlapOS.SoftwareReleases.IntegrationTest-py3-luke/feature/edgetest-pop

00:31:14