[Python] Catch serial.serialutil.SerialException in driver

[magoorden]

When the USB is disconnected, we should properly catch somewhere the serial.serialutil.SerialException and terminate (?) the code.

[falkecarlsen]

Authentic (not clones) of the Arduino Mega 2560 has been ordered for reliability outside this issue, perhaps that fixes it.

I will put a scope on the Arduino as spikes to rule out spikes from DC-drives/solenoids, although this issue is experienced outside of actuating on the hardware.

[falkecarlsen]

Let's assume this issue to be resolved since fitting the new (genuine) Mega. Reopen if it happens again.

[falkecarlsen]

Wrong issue wrt. previous closing. We should still handle serial errors