Indicates the threshold number of a queue on the interface for
which statistics are collected. For example : if the interface
has a queue type of oneP2Q2t, this index value can be 1, 2. If
the value of the corresponding csqIfQueueStatsGranularity for
the queue that this csqIfStatsThresholdNumber belongs to is
'perQueue', this csqIfStatsThresholdNumber index value is
always 1.