This object is used to create (by management agent) and delete
(by management station and/or management agent) individual
conceptual rows in the 'xcmHrDevAlertTable'.
Usage: Management stations can not create rows in the alert
table. Conforming implementations SHALL support 'active' and
'notInService' writes to this 'xcmHrDevAlertRowStatus' row
status object; and SHALL clear the 'xcmHrDevAlertGroup' bit in
'xcmHrGeneralCreateSupport' in the 'xcmHrGeneralTable'.
Usage: Conforming implementations MAY support dynamic row
deletion via 'destroy(6)'. This allows management stations to
delete any any obsolete unary non-critical alerts.