[JSON:API Atomic Operations] Support lid #948

When dealing with atomic operations, updating local records (added in the operation) requires the lid for the backend to understand what to update.

The fix is as simple as this:

 if (resourceId !== undefined) {
   resource.id = resourceId;
 } else {
   resource.lid = id
}

But needs a bit of testing and checking if JSON:API allows having lid for all requests (atomic and non-atomic) or not.