Lengthen keep-alive window for node power

[plaplant]

It seems that the nodes will power down if they do not receive a keep-alive signal to a certain component (maybe the white rabbit?). At times this leads to the entire array on-site shutting down, and requiring all the nodes to be turned on again. We should figure out what component is missing the signal, and how to make this window larger.

[david-deboer]

Apparently 8sec is the maximum watchdog time. The other option is to turn off the watchdog.

[david-deboer]

The no-watchdog option is now available, if we need to use it. Not a good long-term option.