Ticket #48226 - In MMR, double free coould occur under some special condition
    
    Description: commit a0f8e0f981a046882db299a7a6d6d1c01bc19571 introduced
    a memory leak in the case of resolve_attribute_state_present_to_deleted.
    In the case, csnset is not consumed.  Thus, it has to be freed by csnset_
    free.
    
    https://fedorahosted.org/389/ticket/48226
    
    Reviewed by mreynolds@redhat.com (Thank you, Mark!!)