[incubator/zookeeper] Add SSL support

[jeblair]

This adds both quorum and client SSL support. It accepts certificate
material in kubernetes.io/tls format (i.e., compatible with cert-
manager). Client or server support can be configured separately,
and if client SSL support is enabled, plain-text client connections
are disabled.

Signed-off-by: James E. Blair jeblair@redhat.com

Is this a new chart

No

What this PR does / why we need it:

Adds SSL support.

Which issue this PR fixes

Special notes for your reviewer:

Checklist

[Place an '[x]' (no spaces) in all applicable fields. Please remove unrelated fields.]

• DCO signed
• Chart Version bumped
• Variables are documented in the README.md
• Title of the PR starts with chart name (e.g. [stable/mychartname])

[k8s-ci-robot]

Hi @jeblair. Thanks for your PR.

I'm waiting for a helm member to verify that this patch is reasonable to test. If it is, they should reply with /ok-to-test on its own line. Until that is done, I will not automatically test new commits in this PR, but the usual testing commands by org members will still work. Regular contributors should join the org to skip this step.

Once the patch is verified, the new status will be reflected by the ok-to-test label.

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[k8s-ci-robot]

[APPROVALNOTIFIER] This PR is NOT APPROVED

This pull-request has been approved by: jeblair
To complete the pull request process, please assign kow3ns
You can assign the PR to them by writing /assign @kow3ns in a comment when ready.

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[jeblair]

I'd like to take a different approach, will open a revised PR.