Galil: Should be in alarm on startup if disconnected

As a user I would like to know if my motors are not connected. Currently if I start a Galil and it is not connected to any kit it will not go into alarm. To reproduce:

- Start a galil (with a valid MTRCTRL but not in RECSIM/DEVSIM)
- Do `caget -a %MYPVPREFIX%MOT:MTR0101` and confirm that the motor timestamp is undefined and the record is not in `COMM ERROR`

This was discovered when writing support for the Beckhoff. The underlying problem is that the motor will not go out of an undefined state if the position is set to 0 on the first poll of the axis. So to fix you need to set the position to non-zero when there is a comms error. This may be fixed by the new galil driver (https://github.com/ISISComputingGroup/IBEX/issues/2830) or by a later version of the motor record.