Update physics engine node to use WindSensor

[eomielan]

Purpose

The purpose of this issue is to update the physics engine node (boat_simulator/nodes/physics_engine/physics_engine_node.py) to use the WindSensor class.

Description

1. Create a private instance of the WindSensor class.
2. Create a new private method: __update_wind_sensor() and update the wind attribute of the WindSensor instance you created in step 1 using the wind generator (self.__wind_generator).
3. Call this method right before self.__update_boat_state() in the __publish() function.
4. Update the self.__update_boat_state() method to use the wind sensor data rather than the wind generator so that we introduce noise.

Resources

• FluidGenerator class