Ticket 47565 - Content Sync update file needs extensibleObject
    
    The Content Sync Plug-in update file will cause a schema violation
    that causes dse.ldif to fail to load after upgrading an older DS
    instance.  The problem is that the nsslapd-depends-on-name attribute
    is used, but the extensibleObject objectclass is not present for
    the config entry.  This is required since nsslapd-depends-on-named
    is not really defined in the schema like a normal attribute.
    (cherry picked from commit bf1203a0916cdbee27651644b85aa21e6de1224b)