When running ovirt-engine-extension-aaa-ldap-setup, user should be able to choose custom base DN, as some setups use custom one. But setup tool should offer the one which is automatically resolved.
Included in ovirt-engine-extension-aaa-ldap-1.3.0
Verified with: ovirt-engine-extension-aaa-ldap-setup-1.3.1-0.0.master.20161219093217.git9a5d8da.el7.noarch