Description of problem:
With introduction of 'satellite-maintain self-upgrade' command this causes customer confusion of its purpose and help is unclear

Version-Release number of selected component (if applicable):
Satellite 6.12+

How reproducible:

]# satellite-maintain --help | grep self-upgrade
self-upgrade Perform major version self upgrade

Actual results:
When self-upgrade is run its purpose is to update satellite-maintain rubygem-foreman_maintain only. AKA doing what previous Satellite upgrade steps were "yum install rubygem-foreman_maintain" prior to listing latest versions for upgrade.

Expected results:
I believe the sub command name and the help description is not easily clear what it's doing

Additional info: