Ticket 47670 - Aci warnings in error log
    
    Bug Description:  Some aci warnings are unneccesarily written to the
                      error log.
    
    Fix Description:  Lower the log messaages from SLAPI_LOG_FATAL to SLAPI_LOG_ACL
    
    Patch provided by: chatfield(Thanks!)
    
    https://fedorahosted.org/389/ticket/47670
    
    Reviewed by: nhosoi(Thanks!)
    
    (cherry picked from commit 4f14e7df8215e30d6dd1205638886a877f46a70c)