InfluxDB 2: Cannot find owner of Scraper

```bash
# Create Scraper
--> POST http://127.0.0.1:9999/api/v2/scrapers
--> {
"name": "InfluxDB scraper1599721846296-IT",
"type": "prometheus",
"url": "http://localhost:9999",
"orgID": "c670235192dc73ba",
"bucketID": "ba09f52d6d0e8374"
}
<-- 201 Created http://127.0.0.1:9999/api/v2/scrapers

### Find owners
--> GET http://127.0.0.1:9999/api/v2/scrapers/0649b5e68b73a000/owners
<-- 200 OK http://127.0.0.1:9999/api/v2/scrapers/0649b5e68b73a000/owners
<-- {"links":{"self":"/api/v2/scrapers/0649b5e68b73a000/owners"},"users":[]}
```

__Steps to reproduce:__
List the minimal actions needed to reproduce the behavior.

1. Create Scraper
2. List owners of Scraper

__Expected behavior:__
Return list with owner - user who created the scraper

__Actual behavior:__
Return empty list.

__Environment info:__

* InfluxDB version: InfluxDB v2 nightly from 2020-10-09

Reproduce the behavior by creating a scraper with POST /api/v2/scrapers, then querying GET /api/v2/scrapers/{id}/owners. Trace how the creator is recorded and how owners are returned. Done means the owners response includes the user who created the scraper, with coverage for this sequence.

Written by the indexing model from the issue text.