Foreman Maintain

Cloned from https://bugzilla.redhat.com/show_bug.cgi?id=1632768

If the user has specified invalid values in .hammer/defaults.yml (via the hammer defaults command) foreman-maintain will fail to authenticate and error on most commands.

This can be difficult as a user to determine why it is failing as the user only sees:

1. foreman-maintain health check
   Running preparation steps required to run the next scenarios ================================================================================
   Setup hammer:
   Configuring Hammer CLI...
   Hammer admin password:
   [FAIL]
   Hammer configuration failed: Is the admin password correct? (it was stored in /etc/foreman-maintain/foreman-maintain-hammer.yml)Is the server down?

this makes it look like the password is incorrect or the server is down, when in fact, there may be a setting in ~./.hammer/defauts.yml that is invalid or conflicting with foreman-maintain's usage of hammer.

This results in failed upgrades with difficulty determining why:

1. satellite-installer --upgrade
   ...
   Upgrade Step: Running installer...
   Installing Done [100%] [...........................................................................]
   The full log is at /var/log/foreman-installer/satellite.log
   Upgrade Step: restart_services...
   Redirecting to 'foreman-maintain service'
   Running preparation steps required to run the next scenarios =============================================================================
   Setup hammer: Configuring Hammer CLI...
   Hammer admin password:

   [FAIL]