class TunnelGatewayPumper
extends Object
implements Runnable

Run through the tunnel gateways that have had messages added to them and push those messages through the preprocessing and sending process. TODO do we need this many threads? TODO this combines IBGWs and OBGWs, do we wish to separate the two and/or prioritize OBGWs (i.e. our outbound traffic) over IBGWs (participating)?