Hello,
I built today RPMs for OpenLDAP 2.4.27, for those who are interested, they are available here: http://ltb-project.org/wiki/download#openldap
You can find the description of the RPMs here: http://ltb-project.org/wiki/documentation/openldap-rpm They include an init script described here: http://ltb-project.org/wiki/documentation/openldap-initscript
Hope it helps,
Clément.