Ticket 47587 - hard coded limit of 64 masters in agreement and changelog code
    
    Bug Description:  Need to remove hardcoded limit of 64 masters.
    
    Fix Description:  Changed the default limit to 256, and then we resize the array
                      as needed.
    
    https://fedorahosted.org/389/ticket/47587
    
    Reviewed by: richm & tbordaz(Thanks!!)
    (cherry picked from commit bae797c94207d15025e763cfea0634f42eeb1210)