intg: Change preference of openldap module path
    
    The /usr/lib64 should be preffered path for searching
    binary modules for openldap backends. The /usr/lib/ should
    be used for storing no binary files on 64 bit platform
    e.g. scripts ...
    The current vresion of would choose /usr/lib/ even though
    /usr/lib64 contains real openldap modules.
    
    Reviewed-by: Nikolai Kondrashov <Nikolai.Kondrashov@redhat.com>