Ticket 48894 - Issues with delete of entrywsi with large entries.
    
    Bug Description:  During delets of entries with a high number of attributes,
    a high amount of latency was observed. This was because during the valueset
    purge for older csn's the vs->sorted was disposed of. This triggered a rebuild
    of the valueset.
    
    Fix Description:  During the delete, don't purge the vs->sorted array. We need
    to preserve it if possible which prevents the need to resort the array after
    the delete.
    
    https://fedorahosted.org/389/ticket/48894
    
    Author: Mohammad N., Burk, J.
    
    Review by: wibrown, mreynolds (Thanks)