Ticket 49596 - repl-monitor.pl fails to find db tombstone/RUV entry
    
    Description:  The tool was doing a scope "one" search to get the tombstone/RUV
                  entry.  This no longer works as it should be a "sub" search.
    
    https://pagure.io/389-ds-base/issue/49596
    
    Reviewed by: firstyear(Thanks!)