Accurate readings should be a function of sensor reliability and speed

[gerasimou]

In the simulator, the probability that a sensor reading is accurate should be a function of sensor reliability and UUV speed; as specified in the SEAMS'17 paper.

It seems that there is a bug here:
https://github.com/gerasimou/UNDERSEA/blob/master/moos-ivp-UNDERSEA/src/sSensor/Sensor.cpp#L151