Evaluate rubocop todos

[hannahramadan]

Our rubocop version and .rubocop_todo.yml was updated with #3385, so we have some new opportunities to improve our code. Let's evaluate our code based on the newly generated todo file. Once issues are addressed, regenerate the todo file with bundle exec rubocop --regenerate-todo

[Newrelic-Boomi]

https://new-relic.atlassian.net/browse/NR-505602