Ticket 532 - RUV is not getting updated for both Master and consumer
    
    Bug Description:  Orignal patch did not update the purl in the ruv.
    
    Fix Description:  Check if the purl has changed when adding the new
                      replica to the ruv.  If it has, rewrite it.
    
    https://fedorahosted.org/389/ticket/532
    
    Reviewed by: Noriko(Thanks!!)