Fix TLS issue with OpenStack auth (Designate)

[FestivalBobcats]

It appears as though the certificate options for OpenStack were only being configured for requests to Designate, and not for the initial authentication requests to Keystone. This change resolves that issue.

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[FestivalBobcats]

I signed it

[njuettner]

👋. Thanks for your PR 🙂 @FestivalBobcats.

Does the tests still cover your change or do you need tests for that?

[FestivalBobcats]

Hi @njuettner, I didn't add or remove any functionality from the Designate provider, and it looks like only the implementation of the provider interface is tested. A test here would just assert that the OpenStack client was correctly initialized -- should I add that?

[njuettner]

@FestivalBobcats If you don't mind please add the test. This would be great 👍

[FestivalBobcats]

@njuettner I added a test, but keep running into timeouts with verify-gometalinter.sh in CI. Are you familiar with that issue?

[njuettner]

Sometimes there's a timeout. I just triggered it again.

[njuettner]

/lgtm

[njuettner]

/approve

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[APPROVALNOTIFIER] This PR is APPROVED

This pull-request has been approved by: njuettner

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