Ensure rule docs mention all rule options

[bmish]

Add test to ensure:

1. Any rule with options has a ## Options section in its rule doc.
2. Any named rule options are mentioned in the rule doc.

Based on the same test I wrote here: https://github.com/ember-cli/eslint-plugin-ember/blob/4f26c0bc7e34400007e02939a9c6e183078a3e87/tests/rule-setup.js#L111

[coveralls]

Coverage remained the same at 100.0% when pulling d8c4642 on bmish:rule-setup-test-options into 5f50d24 on platinumazure:master.

[platinumazure]

This is huge, thanks for this!