Build: remove traces of mozldap library
    
    Mozldap is not used for some time now. We can remove
    all traces of it.
    
    AFAIK the complex logic for OpenLDAP detection should not be
    necessary and -lldap_r -llber options should suffice.
    
    Unfortunatelly OpenLDAP package does not ship
    package config files so we have to hardcode flags.
    
    Reviewed-By: Martin Basti <mbasti@redhat.com>
    Reviewed-By: Alexander Bokovoy <abokovoy@redhat.com>