This object is used to create or delete
the row entry in cnpdThresholdConfigTable.
When creating a row entry the management station
is required to specify a value for
cnpdThresholdConfigIfIndex, cnpdThresholdConfigRising
and cnpdThresholdConfigFalling.
'active' means that a createAndGo or active has
been issued, AND a valid ifIndex exists. And therefore
if a row is 'active' it means a ThresholdHistory entry
may have been generated if the value was breached.
If you set an 'active' row to 'createAndWait' - it will
in fact get the status 'notReady'.
Likewise if you set any row to 'notInService' or 'notReady'
it will go to the 'notReady' state.