[dkr] Add more duct tape to faucet
[dkr] Add more duct tape to faucet

* Increase mint timeout to 10s. This was initially set when minting was
  completely non-blocking, it now blocks and has to deal with fullnode
  sync delay.
* Don't kill CLI after a successful mint.

I can do serial mint requests with no errors on my testnet with these
changes.

Closes: #5940

libra/libra,aptos-labs/aptos-core,libra/libra,aptos-labs/aptos-core,aptos-labs/aptos-core,libra/libra,aptos-labs/aptos-core,libra/libra,aptos-labs/aptos-core,libra/libra,aptos-labs/aptos-core,aptos-labs/aptos-core