The value of tmnxMobPdnRatingGrpRowStatus specifies the row status
of this entry. It is used for creation and deletion of this Rating
Group entry.
In order for the row creation to succeed, values for
tmnxMobPdnRatingGrpActvtThresold must be included in the same SNMP
SET PDU as tmnxMobPdnRatingGrpRowStatus. Otherwise,
the SET request will fail with an 'inconsistentValue' error.