Ticket 47636 - errorlog-level 16384 is listed as 0 in cn=config
    
    Bug Description:  Even if the nsslapd-errorlog-level is set to the
                      default value(16384), a search on cn=config returns
                      the value "0".  This is inconsistent and confusing
                      with the server documentation.
    
    Fix Description:  Do not convert the default errorlog level to zero when
                      updating the internal configuration.  We still allow
                      zero to be set from a ldap client to return the logging
                      to the default state, but that zero will still be stored
                      as 16384.
    
    https://fedorahosted.org/389/ticket/47636
    
    Reviewed by: rmeggins & nhosoi(Thanks!!)