Ticket 50077 - Do not automatically turn automember postop modifies on
    
    Description:  Although we have set the new postop processing on by
                  default in the template-dse.ldif, we do not want to
                  enable it by default for upgrades (only new installs).
    
                  So if the attribute is not set, it is assumed "off".
    
    https://pagure.io/389-ds-base/issue/50077
    
    Reviewed by: firstyear(Thanks!)