Update logstash chart to support custom ports

[ChiefAlexander]

• Chart version not bumped (the versions are all bumped and released at the same time)
• README.md updated with any new values or changes
• Updated template tests in ${CHART}/tests/*.py
• Updated integration tests in ${CHART}/examples/*/test/goss.yaml

[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?

[cla-checker-service]

💚 CLA has been signed

[ChiefAlexander]

I've signed the CLA. Not sure how to rerun the check...

[jmlrt]

jenkins test this please

[jmlrt]

Hi @ChiefAlexander,

Thanks for this PR.

LGTM, however I would prefer naming this values extraPorts to keep consistent with the others values prefixed by extra. WDYT?

Also, it would be great to add a python test for this feature. You can find an example for extra container feature here, tests can then be run with make test (see Testing).

I can create the test in another PR if you're not confortable with it.

[ChiefAlexander]

@jmlrt Thanks for the review! I have made your suggested changes.

[jmlrt]

jenkins test this please

[jmlrt]

Thanks for adding the test.
Some change to do to make Black formatter happy in elastic+helm-charts+pull-request+lint-python/22.

[jmlrt]

jenkins test this please

[jmlrt]

LGTM