This object specifies the life of all the probes included in
the object rttMonGrpScheduleAdminProbes, that are getting group
scheduled. This value will be placed into
rttMonScheduleAdminRttLife object for each of the probes listed
in rttMonGrpScheduleAdminProbes when this conceptual control
row becomes 'active'.
The value 2147483647 has a special meaning. When this object is
set to 2147483647, the rttMonCtrlOperRttLife object for all the
probes listed in rttMonGrpScheduleAdminProbes, will not
decrement. And thus the life time of the probes will never end.