Ticket 49194 - Lower default ioblock timeout
    
    Bug Description:  The default ioblock timeout is very high: 30
    minutes. This often results in hangs and other odd symptoms.
    
    Fix Description:  Reduce the time to 10 minutes, and then
    step it down further in the future.
    
    https://pagure.io/389-ds-base/issue/49194
    
    Author: wibrown
    
    Review by: mreynolds (Thanks!)