Bug: Fix issue with jest projects matching ui/node_modules

[tmeasday]

Issue:

(1) sometimes tests come up twice, both within a project and at the root. They fail in the latter with babel problems

Also there are a bunch of warnings like:

● Validation Warning:

  Unknown option "projects" with value ["<rootDir>/addons/*", "<rootDir>/frameworks/!(angular)*", "<rootDir>/lib/*", "<rootDir>/renderers/*", "<rootDir>/ui/*"] was found.
  This is probably a typing mistake. Fixing it will remove this message.

  Configuration Documentation:
  https://jestjs.io/docs/configuration

(2) sometimes jest fails completely complaining about duplicate project paths.

The issue comes from the projects field matching folders with no jest.config.js. I've seen two so far:

• code/ui/node_modules - there's a .cache in there from running our internal SB.
• addons/storyshots - this was recently renamed and sometimes gets left hanging out by git when you switch branches.

What I did

Ignored the first folder with a glob.

I assume the second problem will go away by itself, I mention it here just in case anyone gets the same issue, so they know to just delete it.

How to test

Run yarn test

[IanVS]

Seems reasonable to me.