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Description of problem:
"defaults" sudo entry is ignored with OpenLDAP server, when ldap_sudorule_host is set to non-default value.

Version-Release number of selected component (if applicable):
libsss_idmap-1.9.2-59.el6.x86_64
sssd-client-1.9.2-59.el6.x86_64
sudo-1.8.6p3-6.el6.x86_64
sssd-1.9.2-59.el6.x86_64
libsss_sudo-1.9.2-59.el6.x86_64
openldap-servers-2.4.23-31.el6.x86_64

How reproducible:
always

Steps to Reproduce:
1. Use the attached sudo_openldap_host_attr_name_test.ldif file to fill LDAP directory.
2. Use the attached sssd.conf as the base for SSSD configuration.
3. Execute "su -c 'sudo -u user2 true' user1" as root.
  
Actual results:
sudo: no tty present and no askpass program specified

Expected results:
user1 is not allowed to run sudo on client-rhel6.  This incident will be reported.

Additional info:
No rules apart from "defaults" need to be present to reproduce this.

Created attachment 672087 [details]
sudo_openldap_host_attr_name_test.ldif

Created attachment 672088 [details]
sssd.conf

This works with 389-ds.

Upstream ticket:
https://fedorahosted.org/sssd/ticket/1736

This is actually not a bug.

It turned out that Nikolai changed the name of attribute sudoHost to sudoHostNot in SSSD, but he didn't modify sudoRole schema, thus sudoHostNot attribute was not known by OpenLDAP server.

Apparently OpenLDAP server can't deal with (!(sudoHostNot=*)) filter type on attribute that is not present in schema.