The value of vRtrMplsP2mpInstRecordLabel specifies when the value of
vRtrMplsP2mpInstRecordLabel is 'record', recording of labels at each
node that a P2MP LSP traverses is enabled.
When the value of vRtrMplsP2mpInstRecordLabel is 'noRecord',
recording of labels at each node that a P2MP LSP traverses is
disabled.