Revert "stack/monitor: cleanup deprecated (and confusing) config"

This reverts commit f34aeeab.

this had the side effect of installing `promise-check-free-disk-space` which
is still used - at least by caddy tests.
45 jobs for fix/monitoring-promise-username-password in 0 seconds
Status Job ID Name Coverage
  External
passed SlapOS.Eggs.UnitTest-Master.Python2

00:00:00

running SlapOS.Eggs.UnitTest-Master.Python2

24042:36:51

running SlapOS.Eggs.UnitTest-Master.Python3

24042:37:06

passed SlapOS.SlapRunner.ResilienceTest-Master

00:23:12

failed SlapOS.SlapRunner.ResilienceTest-Master.ERP5

00:21:31

failed SlapOS.SoftwareReleases.IntegrationTest-Jerome-Python3

06:26:12

failed SlapOS.SoftwareReleases.IntegrationTest-Jerome-WIP

07:32:21

passed SlapOS.SoftwareReleases.IntegrationTest-Master.Python2

07:26:05

failed SlapOS.SoftwareReleases.IntegrationTest-Master.Python3

05:35:51

failed Wendelin.StandaloneDeploymentScriptTest-Debian.Buster.Master

15:03:30

passed SlapOS.Eggs.UnitTest-Master.Python2

passed SlapOS.Eggs.UnitTest-Master.Python2

00:11:29

passed SlapOS.Eggs.UnitTest-Master.Python2

00:08:29

passed SlapOS.Eggs.UnitTest-Master.Python2

passed SlapOS.Eggs.UnitTest-Master.Python2

00:25:02

passed SlapOS.Eggs.UnitTest-Master.Python2

00:15:04

passed SlapOS.Eggs.UnitTest-Master.Python2

passed SlapOS.Eggs.UnitTest-Master.Python2

passed SlapOS.Eggs.UnitTest-Master.Python2

passed SlapOS.Eggs.UnitTest-Master.Python2

00:12:53

passed SlapOS.Eggs.UnitTest-Master.Python3

passed SlapOS.Eggs.UnitTest-Master.Python3

00:09:33

passed SlapOS.Eggs.UnitTest-Master.Python3

00:09:57

passed SlapOS.Eggs.UnitTest-Master.Python3

00:21:28

passed SlapOS.Eggs.UnitTest-Master.Python3

00:11:12

passed SlapOS.Eggs.UnitTest-Master.Python3

passed SlapOS.Eggs.UnitTest-Master.Python3

passed SlapOS.Eggs.UnitTest-Master.Python3

00:09:38

passed SlapOS.Eggs.UnitTest-Master.Python3

passed SlapOS.Eggs.UnitTest-Master.Python3

passed SlapOS.SlapRunner.ResilienceTest-Master

00:21:45

passed SlapOS.SlapRunner.ResilienceTest-Master

00:22:03

passed SlapOS.SlapRunner.ResilienceTest-Master

00:22:50

passed SlapOS.SlapRunner.ResilienceTest-Master

00:22:02

failed SlapOS.SlapRunner.ResilienceTest-Master.ERP5

00:28:51

failed SlapOS.SlapRunner.ResilienceTest-Master.ERP5

00:25:30

failed SlapOS.SlapRunner.ResilienceTest-Master.ERP5

00:25:55

failed SlapOS.SlapRunner.ResilienceTest-Master.ERP5

00:22:03

failed SlapOS.SoftwareReleases.IntegrationTest-Jerome-WIP

07:00:06

failed SlapOS.SoftwareReleases.IntegrationTest-Jerome-WIP

26:30:14

failed SlapOS.SoftwareReleases.IntegrationTest-Jerome-WIP

07:06:34

failed SlapOS.SoftwareReleases.IntegrationTest-Master.Python2

06:06:43

failed SlapOS.SoftwareReleases.IntegrationTest-Master.Python3

03:59:51

failed Wendelin.StandaloneDeploymentScriptTest-Debian.Buster.Master

15:03:16

failed Wendelin.StandaloneDeploymentScriptTest-Debian.Buster.Master

15:03:54