[filebeat] change default value of filebeat.extraContainers

[cgroschupp]

• Chart version not bumped (the versions are all bumped and released at the same time)
• README.md updated with any new values or changes

Fixes #1636

I got this error:

template: filebeat/templates/daemonset.yaml:199:14: executing "filebeat/templates/daemonset.yaml" at <.Values.extraContainers>: wrong type for value; expected string; got []interface {}

[elasticmachine]

Since this is a community submitted pull request, a Jenkins build has not been kicked off automatically. Can an Elastic organization member please verify the contents of this patch and then kick off a build manually?

[elasticmachine]

Since this is a community submitted pull request, a Jenkins build has not been kicked off automatically. Can an Elastic organization member please verify the contents of this patch and then kick off a build manually?

[botelastic]

This PR has been automatically marked as stale because it has not had recent activity. It will be closed if no further activity occurs. Thank you for your contributions. To track this PR (even if closed), please open a corresponding issue if one does not already exist.

[cgroschupp]

@jmlrt

[cgroschupp]

@jmlrt please take a look.

[kollipara]

Hi, This PR is waiting for approving review. Please review the PR.

[cgroschupp]

Hi @jmlrt, Is there anything to improve?

[botelastic]

This PR has been automatically marked as stale because it has not had recent activity. It will be closed if no further activity occurs. Thank you for your contributions. To track this PR (even if closed), please open a corresponding issue if one does not already exist.

[cgroschupp]

/bump still waiting for review