Replace hbbft-specific parity toml config parameters with data supplied by contracts

[dforsten]

All information to start validators is now available through contracts - eliminate the temporary "hbbft" parameters from the parity toml config parser.

Adapt the hbbft config generator for the change, make it generate the necessary data to initialize the hbbft contracts with an arbitrary number of initial validators.

[SurfingNerd]

that link on github is a missinterpretation made by github. It's connected to this pull request: https://github.com/DMDcoin/hbbft-posdao-contracts/pull/48