Adding a high load wallet as an extra faucet by default

[dkatzan]

Hi, it will be great if as an addition to the existing faucet the node starts with
we can also have another faucet which is an high load wallet
this will allow to get funds for multiple addresses at the same time for running stuff in parallel

currently, due to nonces, the faucet is only able to produce a transaction every ±5 sec