Ticket 47318 - server fails to start after upgrade(schema error)
    
    Bug Description:  After upgrading the server fails to start because the Root DN
                      access control plugin's entry changed to include nsslapd-Plugin
                      objectclass.
    
    Fix Description:  Update the schema to allow nsslapd-plugin-depends-on-type in
                      the nsslapdPlugin objectclass.
    
    https://fedorahosted.org/389/ticket/47318
    
    Reviewed by: nhosoi(Thanks!)