Ticket 49060 - Increase number of masters, hubs and consumers in topology
    
    Bug Description:
    Currently only 10 masters, hubs and consumers can be created for
    testing using lib389. We should increase that number to at least
    60 (number of supported replicas in RHEL7.3).
    
    Fix Description:
    Generate constants for instances on the fly, instead of hardcoding.
    
    https://fedorahosted.org/389/ticket/49060
    
    Reviewed by: spichugi (Thanks!)