The value of vRtrRsvpDSTETeClassPriority indicates the priority
associated with the TE class. Both vRtrRsvpDSTETeClassClassType
and vRtrRsvpDSTETeClassPriority need to be set in the same PDU for
a row to be created. A value of -1 indicates that the priority for
this TE class is invalid and hence the TE class is considered as not
configured.