Log load on ops events

Load was not being logged properly because the logger was looking for `event.proc.load` when `load` is assigned to `event.os.load`. This update fixes that issue and adds a space for easier
readability.

This update also brings test coverage back to 100% under the new release of Lab.

Essentially (and unintentionally), it combines https://github.com/spumko/good/pull/112 and https://github.com/spumko/good/pull/114 (with some modifications on the formatting) and brings test coverage to 100%. If you'd prefer to merge those first, let me know. I can fetch those changes and fix the tests to get everything up to snuff.