Reduce validator timeout

[kxcd]

Platform has now been running for more than 90 days and gone through several epochs in that time, however, when the system happens upon a validator that is offline or otherwise not responding a lag of a few minutes occurs before a transition can be mined. This delay is far too long for where we are with the system at this point in time, please reduce to no greater than 30 seconds.

I've been told the parameter to change is in Tenderdash.