Dummy State Machine

[matejpavlovic]

Create a dummy state machine that does not execute any meaningful protocol, but involves all the modules.
This is only to demonstrate / test the Node and its orchestration of the individual modules.
To be pushed to the top-level-refactor branch.

[matejpavlovic]

The dummy state machine (meanwhile renamed to dummy protocol) is now part of the top-level-refactor branch, under pkg/ordering/dummyprotocol.go.