Fix Wildcard domains returned as ASCII in dns-controller

[mikesplain]

After running into #2671 whenever dns-controller restarted, I looked into why dns-controller successfully creates entries for wildcard domains (e.g. *.example.com ) but after restarting, it errors, unable to find the old record. It looks amazon returns ascii \\052.example.com instead of the *.example.com we expect. This was a simple fix I tested in our cluster and it seems to have fixed the issue. I'm open to any changes but I think this could be a useful fix for those that may run into this in the future.

This isn't a new thing apparently: boto/boto#818

Fixes #2671

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[mikesplain]

/assign @kris-nova

[justinsb]

/lgtm

Thanks @mikesplain

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[APPROVALNOTIFIER] This PR is APPROVED

This pull-request has been approved by: justinsb, mikesplain

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[mikesplain]

Great! Thanks for taking a look @justinsb!

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/test all [submit-queue is verifying that this PR is safe to merge]

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Automatic merge from submit-queue