Dribbler ballsensor not compatible with reducing dribbler speeds

[supertom01]

When one is reducing the dribbler bar speed (but not setting it to 0), then the dribbler sensor code will at this state assume that we have the ball, since it looks for the following three conditions:

1. Check if we have a reduced speed
2. Check if the data is above a logical speed
3. Check that the average commanded speed is not 0

This issue is not pressing at the moment, but something to keep in mind when working on dribbler control