Ticket 47918 - result of dna_dn_is_shared_config is incorrectly used
    
    Bug Description:  dna_load_shared_servers() is called for all entries,
                      except the config entries
    
    Fix Description:   revert the logic of the result of dna_dn_is_shared_config()
    
    https://fedorahosted.org/389/ticket/47918
    
    Reviewed by: Mark, Thanks
    
    (cherry picked from commit 8d9679194c945a6e0b06f6527fba6b4548d4844d)