bdb6962 Ticket 47771 - Move parentsdn initialization to avoid crash

Authored and Committed by mreynolds 6 years ago
    Ticket 47771 - Move parentsdn initialization to avoid crash
    
    Bug Description:  It's possible to call slapi_sdn_done() before parentsdn is
                      initialized - which will crash the server.
    
    Fix Description:  Initialize parentsdn at the top of the function.
    
    https://fedorahosted.org/389/ticket/47771
    
    Reviewed by: nhosoi(Thanks!)
    (cherry picked from commit 991984f1544c096d46a54ed3117542e8c5f3d70c)