[Reviewer: Graeme] Make zmq port different between sprout and bono

Can you review these sprout changes. They:
- Change the stats script so that they accept a new port parameter
- Change the stats script so that they expect the accumulator stats to have a count
- Set up different zmq ports for sprout and bono

(This also needs the cpp-common module updating when those changes are merged to master)

(2 of 7)