Foreman Maintain

# ./bin/foreman-maintain health check --label hammer-ping
Running ForemanMaintain::Scenario::FilteredScenario
================================================================================
Check whether all services are running using hammer ping:             [FAIL]
no implicit conversion of nil into Array
--------------------------------------------------------------------------------
Scenario [ForemanMaintain::Scenario::FilteredScenario] failed.

The following steps ended up in failing state:

  [hammer-ping]

Resolve the failed steps and rerun
the command. In case the failures are false positives,
use --whitelist="hammer-ping" 

Steps:

1. systemctl stop elasticsearch
2. ./bin/foreman-maintain health check --label hammer-ping

Expected result:
if hammer-ping failed, foreman-maintain should ask for restarting services.

Additional info:
Reproducible for sat 6.1 as elasticsearch is present.