Ticket 47733 - ds logs many "Operation error fetching Null DN" messages
    
    Bug Description:  in ipa tests there are many of the above
    			messages logged. The reason is that
    			in txn access to database for a locked
    			page DB_DEADLOCK is detected and
    			after a few retries the error is logged.
    			for more info cf to the ticket
    
    Fix Description:   introduce a sleep in th eretry loop to get a chance that
    			th epage will be released
    
    https://fedorahosted.org/389/ticket/47733
    
    Reviewed by: richm,thanks