Allow applications to write tests that interface with remote networks

[jvff]

Motivation

Applications can write integration tests that simulate how the application interacts with a validator and with other applications. However, that only runs with one validator, and does not provide a node-service that application frontends can use.

Proposal

Allow the creation of end-to-end tests that interface with a remote network (like a localnet, devnet or testnet). The test would obtain tokens and an account using a faucet.