Foreman Maintain

Cloned from https://bugzilla.redhat.com/show_bug.cgi?id=1804711

Description of problem:
satellite-maintain snapshot backup fails to restore the services if it fails at any stage of backup.

Version-Release number of selected component (if applicable):
6.6

How reproducible:
Always

Steps to Reproduce:
1) Check the services status.
2) Rhun below command to take the backup:

1. satellite-maintain backup snapshot --assumeyes /var/log/foremain_maintain_$(date +%F_%H_%M).log

If the backup fails which can happen due to multiple reasons, then restore services part won't get executed. This results in Red Hat Satellite server in unresponsive state.

To restore the server back, need to restart the services manually like:

1. katello-service restart

Actual results:
Failed Red Hat Satellite server services.

Expected results:
Should restore the Red Hat Satellite services back even if the backup fails at any stage.