Add single pod metrics

[RCCSilva]

No description provided.

[linux-foundation-easycla]

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• ✅ login: RCCSilva / name: Rafael Coelho (ed038a5)

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[RCCSilva]

Considering the issue #844, this PR implements the feature to fetch metrics of single pods given their namespace and name.

[brendandburns]

/lgtm
/approve

Thanks for the PR!

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[APPROVALNOTIFIER] This PR is APPROVED

This pull-request has been approved by: brendandburns, RCCSilva

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[hardillb]

Could somebody point me to where I can find the release schedule for this client please (and how to find out if this PR will be included in 0.16.x or in 0.17.x)

Thanks.