Adhere to foodcritic's default exclusions

[haidangwa]

I am getting warnings for foodcritic violation in the spec directory. As of Foodcritic/foodcritic#148 being resolved, the spec and test directories are ignored by foodcritic.

I am getting this in my *_spec.rb files under spec/unit/recipes.

Versions:

• linter-foodcritic 0.5.4
• Mac OS Sierra

$ chef exec gem list foodcritic

*** LOCAL GEMS ***

foodcritic (11.0.0, 10.4.1, 9.0.0, 8.2.0, 7.1.0, 7.0.1)

[tas50]

This is certainly something that should get fixed here. Foodcritic does a poor job of detecting what is a cookbook and what isn't and it often gets confused by specs and test cookbooks which should get tested. I'm working on fixing that in Foodcritic, but it requires a fundamental redesign to how it handles file detection so it might be a while.