Defines a table for storing the results of an OAM 'p2mpLspTrace'
probe operation when a Downstream Mapping TLV was returned. Each row
represents a single label map within the returned downstream mapping
TLV.
An entry in this table is created when the result of an OAM
'p2mpLspTrace' probe is determined.
An entry is removed from this table when its corresponding
tmnxOamTrCtlEntry is deleted.