#3745278 Checkout: add summary business plan features (4)

This is a first step towards adding plan-specific features to the Checkout summary. It adds the following features to the summary when a 1- or 2-year business plan is in the cart:

• Free domain for one year (when a domain isn’t in the cart)
• Install plugins and themes
• Drive traffic to your site with our advanced SEO tools
• Track your stats with Google Analytics

To test:

• add a business plan to your cart and visit Checkout with ?flags=composite-checkout-testing
• verify that the checkout summary has the added features
• switch plan variation and verify that the features remain
• add a domain and verify that the “Free domain for one year” feature is removed (a separate domain item should be seen)