Description of problem:

The command 'satellite-maintain packages check-update' fails when there are no packages to be updated.
—
I, 2022-04-08 13:28:47-0400 #9496 INFO – : Running foreman-maintain command with arguments [["packages", "check-update"]]
I, 2022-04-08 13:28:47-0400 #9496 INFO – : === Scenario 'Check for available package updates' started ===
I, 2022-04-08 13:28:47-0400 #9496 INFO – : — Execution step 'Check for available package updates' [packages-check-update] started —
D, 2022-04-08 13:28:47-0400 #9496 DEBUG – : Running command yum -y --disableplugin=foreman-protector check-update with stdin nil
D, 2022-04-08 13:29:06-0400 #9496 DEBUG – : output of the command:
Loaded plugins: product-id, search-disabled-repos, subscription-manager
E, 2022-04-08 13:29:06-0400 #9496 ERROR – : Failed executing yum -y --disableplugin=foreman-protector check-update , exit status 0:
Loaded plugins: product-id, search-disabled-repos, subscription-manager (ForemanMaintain::Error::ExecutionError)
—

How reproducible:
100%

Steps to Reproduce:
1. Update all the rpms

2. Run:
~~~
satellite-maintain packages check-update
~~~

Actual results:
~~~
satellite-maintain packages check-update
Running Check for available package updates
================================================================================
Check for available package updates: [FAIL]
Failed executing yum -y --disableplugin=foreman-protector check-update , exit status 0:
Loaded plugins: product-id, search-disabled-repos, subscription-manager
--------------------------------------------------------------------------------
Scenario [Check for available package updates] failed.

The following steps ended up in failing state:

[packages-check-update]

Resolve the failed steps and rerun
the command. In case the failures are false positives,
use --whitelist="packages-check-update"
~~~

Expected results:
The tasks should not fail if there are no RPM's to be updated

Additional info:

The RC=100 is expected when 'yum update-check' finds a RPM. On the other hand, the RC=0 is expected when no RPM's are returned(Operation was successful). And the code should handle both RC's.