Ticket 49155 - Fix db2ldif path in test
    
    Bug Description:  Ticket 47536 uses an incorrect path, which can cause
    db2ldif to fail.
    
    Fix Description:  Use the sbin path from paths.py.
    
    https://pagure.io/389-ds-base/issue/49155
    
    Author: wibrown
    
    Review by: mreynolds (Thanks!)