First commit of OpenLDAP olc configuration files

First commit of the olc or cn=config configuration files for
OpenLDAP 2.4.x. The schema LDIF should be useable for any
OpenLDAP 2.4.x server on any platform. The bootstrap LDIF
files are specifically for evolving an openldap-server-2.4.x
deployment on RHEL/CentOS 6.x.