Mock bcrypt during make test-integration

[matthew-white]

We have a few different makefile rules related to testing: test, test-full, test-integration, and test-unit. test-full is what's run in CircleCI, but test is much faster because it mocks bcrypt. test-integration and test-unit run a subset of tests, and I believe they're only run locally. However, unlike test, they don't mock bcrypt. I've noticed that this makes test-integration take a long time. I often run test-integration, and it'd be nice if it mocked bcrypt so that it was faster. Another way to put it is that I think test-integration should be a subset of test rather than a subset of test-full. I think it's important that tests in CircleCI don't mock bcrypt, but while iterating on development locally, it's nice to be able to run tests more quickly.

I thought about mocking bcrypt in test-unit as well, but unlike test-integration, test-unit runs quite quickly, so I don't think it needs it.

Before submitting this PR, please make sure you have:

• run make test-full and confirmed all checks still pass OR confirm CircleCI build passes
• verified that any code from external sources are properly credited in comments or that everything is internally sourced

[ktuite]

I like this change a lot and I think Alex's point about removing env (in both places) checks out.