More run tests

[wwilsman]

Purpose

Adds unit tests and docs for most of the remaining run pieces.

Approach

• Moved around test helpers and utils so it's a bit more organized
• Cleaned up the logging
• Added tests and docs for the serve and adapter plugins
• Added tests and docs for the various manager classes
• Switched to using sinon for spies and stubs instead of hand-rolled fakes
• While writing tests for these pieces, the code was tightened up a bit (made easier to test and updated to desired behavior).
• Updated the coordinator to reflect changed pieces
• Changed the CLI options passed to run

The new CLI options are meant to remove the dot-notation. While being able to specify objects as arguments via the CLI is pretty cool, it has it's limitations. In most places we were using the dot-notation we needed to have special logic in place in order to properly merge options from the opts file. This special logic also included a hack involving specifying the type as an array which made the help output untrue and confusing.

I probably should have split this up into multiple PRs, but it's been sitting around for a few days so I just wanted to get everything in (since it's mostly tests).

Todo

• There are still no unit tests for the coordinator class, or individual browser launchers. Not sure how we would test the launcher classes without actually launching the browsers.
• Instead of making unit tests for the adapters and client code, I think we could test them using the CLI itself, resulting in acceptance testing the CLI while also testing the individual adapters.

[Robdel12]

The changes to the opts are nice 👍 lines back up with my talks haha