Ticket 47638 - Overflow in nsslapd-disk-monitoring-threshold on 32bit platform
    
    Bug Description:  On 32bit platforms 3000000000 overflows when retrieving the value
                      from the dse.  The value was internally processed correctly, but
                      the value returned to the client was incorrect.
    
    Fix Description:  Created a new CONFIG_LONG_LONG config value type, and the associated
                      slapi_entry_attr_set_* function.
    
    https://fedorahosted.org/389/ticket/47638
    
    Reviewed by: rmeggins(Thanks!)
    (cherry picked from commit 020c16333fea42c60108dcc475e7330fde7678a1)