tmnxOamEthCfmTrCtlTable contains Ethernet CFM-specific configuration
information for 'ethCfmLinkTrace' tests.
This table extends the tmnxOamTrCtlTable. A row is automatically
created in this table when a row in tmnxOamTrCtlTable has
tmnxOamTrCtlTestMode set to 'ethCfmLinkTrace'. Deleting a row in
tmnxOamTrCtlTable automatically deletes the row (if any) with the same
index values in tmnxOamEthCfmTrCtlTable.
Test results are stored in tmnxOamTrResultsTable,
tmnxOamTrProbeHistoryTable, tmnxOamTrHopsTable, and
tmnxOamEthCfmTrPrHistTable.