The value of sapFrInfoSchedulingClass specifies the scheduling class
to use for this sap. This object is only applicable for a sapPortId
that has tmnxBundleType set to 'mlfr', sapFrInfoFrf12Mode SAPs set to
'enabled' or tmnxFrIntfFrf12Mode set to 'enabled' and
sapFrf12InfoInterleave set to 'disabled'.