Defines an entry in the tmnxOamVprnTrNextHopTable. The first two
index elements identify the tmnxOamTrCtlEntry that a
tmnxOamVprnTrNextHopEntry belongs to. The third index element
identifies an OAM trace route test run. The fourth, fifth and sixth
index elements select a single OAM 'vprnTraceRoute' reply. The
seventh index selects either the requestor's or responder's route
information. The eighth index selects a single L3 next hop entry
within a specific 'vprnTraceRoute' probe reply route information.