Filebeat improvements

[mdelapenya]

After testing the Helm chart for filebeat in cooperation with the Integrations team (thank you @ChrsMark), we detected the following list of items to be updated in the chart:

• Remove in_cluster from add_kubernetes_metadata (partially removed here):
  • Examples:

    helm-charts/filebeat/examples/security/values.yaml

    Line 9 in 9b406f8

    in_cluster: true

• File inputs Type is different
  • Helm chart:

    helm-charts/filebeat/values.yaml

    Line 7 in a03b78e

    - type: docker

  • Filebeat reference: https://github.com/elastic/beats/blob/7.6/deploy/kubernetes/filebeat-kubernetes.yaml#L12-L15
• Kubernetes metadata uses defaults.
  • Helm chart:

    helm-charts/filebeat/values.yaml

    Line 11 in a03b78e

    - add_kubernetes_metadata: ~

  • Filebeat reference: https://github.com/elastic/beats/blob/7.6/deploy/kubernetes/filebeat-kubernetes.yaml#L16-L20

cc/ @jmlrt