When RttMonRttType is 'pathEcho' this is the maximum
number of statistics paths to record per hourly group.
This value directly represents the path to a target.
For all other RttMonRttTypes this value will be
forced to one by the agent.
NOTE: For 'pathEcho' a source to target path will be
created to to hold all errors that occur when a
specific path or connection has not be found/setup.
Thus, it is advised to set this value greater
than one.
Since this index does not rollover, only the first
rttMonStatisticsAdminNumPaths will be kept.