dryDrainCounters continually sends redundant updates

[Hixie]

If I subscribe to dryDrainCounters, I get the same 0,1 pair sent back to me every second or so forever, despite it not changing.

[0xbarrett]

@Hixie: I'm not sure what's going on with this one, but it's not the behavior that I would expect. It doesn't look like the documentation states this, but many Dishwasher models do not have the ability to detect a dry drain. Thus, dryDrainCounters should always be '0' on these models. We'll get the documentation updated.

[johnnysako]

It is possible that something is causing the data to change and then change back within the 1 second time which would prompt the data to get sent but then appear as though it has not changed.