Small fixes in House, Powerplant & Solar Farm

Changed things:

• tmp100.c :
  • Order of Bytes read from the sensor is flipped now, fixing the temperature readout (2 bytes)
• power_plant.c :
  • Avoiding "divide-by-0" when the touch values are read and dont differ from the "calibration"-touchvalues from boot up.
  • (Problem still: When you plug in the entity you shouldn't touch the touchpad, else the calibration-values are wrong)
• CMakeList :
  • removed "test" due to build errors
• solar_farm.c :
  • changed sensitivity of the ADC (still needs tweaking with new opamp amplification)
  • limited the maximum change of the servo motor positions per task execution