Duplicate promotion adjustments added to order items because of the promotion subscriber

Attaching a different patch that doesn't set the order_item_id.
The problem with not having the order item ID is the Price splitter from Commerce which relies on the order item ID. I'm just hoping the fake order items aren't going to be saved by a promotion offer or anything.

The last submitted patch, 2: 3413473-2.patch, failed testing. View results →

The last submitted patch, 3: 3413473-3.patch, failed testing. View results →