88ac58a upgrade: don't fail if zone does not exists in in find

Authored and Committed by mbasti 4 years ago
    upgrade: don't fail if zone does not exists in in find
    
    In case that zone is not managed by IPA, upgrade fails with not found
    error. Prevent failure in this case.
    
    Reviewed-By: Petr Spacek <pspacek@redhat.com>