gnosis / dex-contracts / 5066

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SubmiSoltuion Script (#914)

Closes #905 

### Test Plan
Downloaded and ran with [this instance](https://gnosis-dev-dfusion.s3.amazonaws.com/data/mainnet_prod/best-ring-solver/results/2020-07-27/instance_5319530_2020-07-27T14%3A15%3A31.313503473%2B00%3A00/06_solution_int_valid.json) on ganache.

Took the tx data and simulated it on tenderly mainnet on block 10542045 (just before the solution was actually submitted). Had to change the batchID (`512c4f` with `512b6a`) as otherwise the tx would fail.

Observe the tx simulation passing.

<img width="1324" alt="Screen Shot 2020-07-28 at 11 29 57" src="https://user-images.githubusercontent.com/1200333/88646847-bf9b9280-d0c5-11ea-9288-648961c45c41.png">

98 of 98 branches covered (100.0%)

Branch coverage included in aggregate %.

264 of 264 relevant lines covered (100.0%)

81.86 hits per line