TE-class mapping is a set of a maximum of eight TE-class items.
TE-class is a <Class-Type, Priority> pair, such as TE-Class[1] = <CT0, 5>.
A (setup/holding) priority associated with an LSP valid only if it appears
as a pair with the Class-Type. Class-Types and priorities can be randomly
paired up. You can define a maximum of eight <Class-Type, Priority> pairs.
The LSR is considered to support a particular Class-Type only if it appears
in the definition of the eight possible TE-Classes. It is suggested that all
the LSRs in the domain use the same TE-Class mapping. The index of this table
is hwMplsTeClassId.