Increase the worker detection timeout.
Review Request #10051 — Created June 29, 2018 and submitted
In some unusual cases, worker nodes may take more than two seconds to
respond when returning their list of tools. This could cause the UI to
show that there are no active worker nodes, even though the worker is
running and connected to the broker. This change increases the timeout.
Looked at the Review Bot admin UI and deteecteed running worker nodes.