The value of vRtrRsvpSessionHoldPriority is the hold priority
to be used for this RSVP session when there is insufficient
bandwidth available to setup another session. The other session's
setup priority is compared against this session's hold priority.
If its setup priority is higher than this session's hold priority,
this session may be preempted by the other session. A value of
zero (0) is the highest priority and a value of seven (7) is the
lowest priority.