Container logs: improve default ndjson parser configuration

[tetianakravchenko]

Signed-off-by: Tetiana Kravchenko tetiana.kravchenko@elastic.co

What does this PR do?

Adjust default ndjson parser configuration. Even though this configuration is commented out, I would add it to prevent Error decoding JSON errors in case there are both: json and not json logs in the k8s cluster.

Checklist

• I have reviewed tips for building integrations and this pull request is aligned with them.
• I have verified that all data streams collect metrics or logs.
• I have added an entry to my package's changelog.yml file.
• I have verified that Kibana version constraints are current according to guidelines.

How to test this PR locally

Related issues

• Relates Filebeat spamming errors when json.keys_under_root: true and message is not json beats#6045

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• Start Time: 2022-02-14T16:10:42.472+0000

• Duration: 36 min 30 sec

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Total	116

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