Move integration tests to their own directory

[chris-belcher]

While reading the rust book again, I realized that it recommends that integration test be put in their own directory, rather than the status quo where they are in main.rs

https://doc.rust-lang.org/book/ch11-03-test-organization.html#integration-tests

[chris-belcher]

Eventually we'll get many many more integration tests, for all the possible branches. For example the case where a taker sends money into a coinswap address but the maker becomes unresponsive, forcing the taker to broadcast its own contract transaction and wait for the timeout to get its money back.

[mojoX911]

+1. It makes sense to put integration tests into their own module.

Also do you think https://github.com/RCasatta/bitcoind crate will be helpful in spawning bitcoind programatically?

This helps in creating multiple bitcoind backend and connect them together and create our own regtest network. I am not sure if it will be super helpful in our test scenarios. But if we need to have multiple core nodes into the test environment, that might come handy.

[chris-belcher]

Multiple bitcoind instances connected together are not that useful for us. If needed it's possible to simulate blockchain reorgs using invalidateblock and reconsiderblock.

[mojoX911]

Ya that makes sense. We will not need to test in p2p network level stuffs.