The value of tHsmdaSchedulerPlcyLvl4GrpId specifies the group this
HSMDA scheduler policy level belongs to. If the value is '0', this
level is not assigned to a scheduler policy group. This object may not
be set simultaneously with tHsmdaSchedulerPlcyLvl4Rate.
Setting tHsmdaSchedulerPlcyLvl4GrpId to non-default value while
tHsmdaSchedulerPlcyLvl4Rate is non-default, results in the level being
added to the group and tHsmdaSchedulerPlcyLvl4Rate being set to
default.
Setting tHsmdaSchedulerPlcyLvl4GrpId to default value results in the
level being removed from any group and tHsmdaSchedulerPlcyLvl4WgtInGrp
being set to default.