Ticket 49042 - Increase cache defaults slightly
    
    Bug Description:  We have very small defaults for most sites right now. If we
    increase these, we will see a benefit to performance and reduction in cache
    eviction. It will help freeipa with it's out of box performance issue before
    we move to the full automatic tuning.
    
    Fix Description:  Change the defaults:
    
        dbcachesize 10MB -> 32MB
        entrycachesize 10MB -> 32MB
        dncachesize 10MB -> 16MB
    
    https://fedorahosted.org/389/ticket/49042
    
    Author: wibrown
    
    Review by: ???