[Box-Admins] box3 may be slowing down a bit

[David T. Lewis]

I have a watchdog timer in my InterpreterVM job so that the Squeak image
will exit if the job is not complete within some time period. I was
starting to get failures on the builds as job runtime exceeded 10 minutes,
so I bumped my timer up from 10 to 15 minutes, and all is well again.

Nothing to worry about, just FYI as we will need to keep an eye on
total load as we add more processing to the system.

Dave