Fix time interval checks in MonitorBaseModule and TrackerReceiverModule

This fixes a bug in the evaluation of the time interval for (1) querying the TRB PLL error count in the tracker receiver, (2) reading and storing the BOBR data in monitoring modules (if configured to do so).

This resulted in half the time the time interval lapse checks being satisifed at a much higher rate (Ns of times a second instead of every 10 s in case (1) and every 5 s in case (2)), so that we were querying the PLL error count (sending commands to the HW) and decoding BOBR data in the SCT monitoring modules at a much higher rate than intended.