Tal Levy 33b9e2065b no null values in ingest configuration error messages (#20616)
The invalid ingest configuration field name used to show itself,
even when it was null, in error messages. Sometimes this does not make
sense.

e.g.
```[null] Only one of [file], [id], or [inline] may be configure```
vs.
```Only one of [file], [id], or [inline] may be configure```

The above deals with three fields, therefore this no one property
responsible.
2016-09-29 11:34:52 +02:00
..
2016-08-24 17:26:28 -04:00
2016-09-21 14:45:28 +02:00