Description of problem:
katello-restore gives error:
**** Given directory does not include pulp content ****
**** Please choose a backup that contains pulp content ****


Version-Release number of selected component (if applicable):
Satellite 6.2


How reproducible:
perform a backup using --skip-pulp-content, then restore following the documentation.

Steps to Reproduce:
1.    katello-backup --skip-pulp-content /backup/

2.    katello-restore /backup/



Actual results:
**** Given directory does not include pulp content ****
**** Please choose a backup that contains pulp content ****
Usage: katello-restore /path/to/dir [options]
 eg: $ katello-restore /tmp/katello-backup
    -y, --assumeyes                  Answer yes for all questions




Expected results:
successful restore without errors



Additional info:
the undocumented fix is to manually create a file in the backup directory called pulp_data.tar to trick the restore into seeing the backup as an acceptable full restore.  An error is given, due to the corrupt pulp_data.tar file, but the restore successfully restores DB info that was backed up.