The value of vRtrMplsP2mpInstRecord specifies whether recording of
all hops that a P2MP LSP traverses is enabled. When the value of
vRtrMplsP2mpInstRecord is 'true', recording of all the hops that a
P2MP LSP traverses is enabled.
When the value of vRtrMplsP2mpInstRecord is 'false, recording of all
the hops that a P2MP LSP traverses is disabled.