Defines an entry in the tmnxOamMcastTrRespTable.
The first two index elements identify the tmnxOamTrCtlEntry that
a tmnxOamMcastTrRespEntry belongs to. The third index element
selects an OAM trace route test run. The fourth index element
selects a single Alcatel-Lucent SROS OAM Trace Route operation result.
The fifth and sixth indexes select the hop and the probe at that
hop for a particular Alcatel-Lucent SROS OAM Trace Route operation.