Add tests to the local-testnet to create transactions and assert correct behavior

[hewison-chris]

To ensure that transactions are handled correctly and fees are paid to Commons Budget and Validators as expected we need some tests.
Some basic tests to start with

• Transactions are added to the block and BOA account balances are updated correctly when money is transfered
• 30% Transaction fees are paid to the Commons Budget
• 70% Transaction fees are paid to the chosen Block proposing Validator

If problems are found then we may have more development work still to do on the explorer and client code.

[mkykadir]

https://github.com/zeroone-boa/local-testnet/pull/82 resolves the first two tests, the third test requires some new implementations that I will make, which are;

1. Web3 Python seems to don't have Clique.API implemented, so an individual HTTP request need to be created to fetch the block signer
2. Previous amounts for all miners (i.e. signers) must be fetched before sending TX, only the signer amount can be fetched for checking 70% fee reward

I tested the 70% reward by hand, it works with no problem

[mkykadir]

https://github.com/zeroone-boa/local-testnet/pull/83 tests for the 70% tx fee to miner

[hewison-chris]

Same tests can be run after

• Bellatrix fork
• Capella fork (new test for withdrawal)
• last commons budget reward block

[mkykadir]

https://github.com/zeroone-boa/local-testnet/pull/84 tests for the block rewards to commons budget