The value of tAdvCfgBWDGranPirPrcnt specifies the granularity
percentage of the child's administrative PIR that should be used as the
rounding step value.
When the value of tAdvCfgBWDGranPirPrcnt is set to '0', the system
removes the operational PIR rounding behavior from all child policers
and queues associated with the policy specified by tAdvCfgPolicyName.