**What**
When a discount is deleted from a cart, the line item adjustments must be refreshed. Now, the cart service `removeDiscount` includes updating the adjustments.
**Tests**
**Add a new integration test which:**
- create a cart with a discount
- add a line item
- validate the adjustments
- remove the discount
- check that the adjustments are not present anymore
**Update unit tests**
The actual tests cases now check that the adjustments repository is called when needed
FIXES CORE-890
d68e81fb3d