179c7fb sudo_ldap: fix sudoHost=defaults -> cn=defaults in the filter

Authored and Committed by fidencio 5 years ago
    sudo_ldap: fix sudoHost=defaults -> cn=defaults in the filter
    
    This is a typo introduced as part of 47ad0778.
    
    Resolves:
    https://pagure.io/SSSD/sssd/issue/3742
    
    Related:
    https://pagure.io/SSSD/sssd/issue/3558
    
    Signed-off-by: Fabiano Fidêncio <fidencio@redhat.com>
    Reviewed-by: Pavel Březina <pbrezina@redhat.com>