Set up a hbbft test network in a new repository

[dforsten]

Follow the approach implemented in the posdao-test-setup repository.

[dforsten]

I forked posdao-test-setup and adjusted it for hbbft here:
https://github.com/lab10-coop/posdao-test-setup

Sending transactions via web3 works and produces blocks as expected, but I do get an error message after the transaction has been sent:

     Error: the object {
  "confirmationChecks": 0
  "confirmations": 0
  "error": "Error: Node error: {\"code\":-32602,\"message\":\"Invalid params: invalid type: null, expected a block number or 'latest', 'earliest' or 'pending'.\"}"
  "receipt": false
} was thrown, throw an Error :)
      at process._tickCallback (internal/process/next_tick.js:68:7)

Which does look similar to a bugreport for web3 in conjunction with parity:
web3/web3.js#2831

[dforsten]

The Honey Badger BFT test setup now works in a 2-node configuration - setting up a 7-node configuration next to be on par with the Aura test setup.