Stand alone joystick process is flakey on main rover

[ottopasuuna]

A while ago I threw together a process that uses the python inputs library to get joystick data. On the mini rover we built, it seems pretty good, though sometimes control is lost. On the main rover, it is pretty wild, frequently not responding well and sometimes responding violently. Jerkiness of wheel movement would be caused by the hall effect sensors not being connected, but something about the new joystick process is off. It could also be a systemd thing, I'm not sure.