Add missing fields to Cart Item

• Type: Sub-Task
• Status: Closed
• Priority: Minor
• Resolution: Fixed
• Affects Version/s: Master
• Fix Version/s: SaaS
• Component/s: APIs, Integrations and Extension Points → Headless Storefront APIs, Shopping Experience
• Labels:
  • SaaS_Project
• Git Pull Request: https://github.com/marco-leo/liferay-portal-ee/pull/760

Add following fields to CartItem in Cart API:

• parentCartItemId (this for product bundles)
• thumbnail
• settings:
  • allowedQuantity
  • maxQuantity
  • minQuantity
  • multipleQuantity