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>