Ticket 47816 -v2- internal syncrepl searches are flagged as unindexed
    
    Bug Description:  if syncrepl is enabled it uses an attribute targetuniqueid
    			for internal searches. this is not indexed and
    			lot of warnings are logged
    
    Fix Description:   add an equality index to the default indexes
    			for exising instances tit will add the index
    			to the changelog backend and trigge a reindex
    
    https://fedorahosted.org/389/ticket/47816
    
    Reviewed by: ?