[elasticsearch] fix escaping issue in readinessprobe (#625)

[denysvitali]

• 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?

[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

[denysvitali]

CLA signed, but the CLA bot doesn't seem to mark it as signed. Let's wait...

[denysvitali]

Nevermind, this implementation needs to be double checked: it fails if the username/password is not set 🤔

[fatmcgav]

@denysvitali Cheers for taking the time to open the issue and this PR.

I think your implementation is pretty much there.
However I've been doing some refactoring of the readinessProbe in-order to resolve #631, which should also solve this issue.
Feel free to test the changes in #638 and let me know if they work for you.

[denysvitali]

Thanks @fatmcgav !
I'll make sure to check your changes, thanks for fixing the issue!

[fatmcgav]

Superseded by #638