Kubernetes Submit Queue 6b1b6d504a Merge pull request #56024 from dimpavloff/aws-elb-set-hc-params ...

Automatic merge from submit-queue (batch tested with PRs 56211, 56024). If you want to cherry-pick this change to another branch, please follow the instructions <a href="https://github.com/kubernetes/community/blob/master/contributors/devel/cherry-picks.md">here</a>.

allow ELB Healthcheck configuration via Service annotations

**What this PR does / why we need it**:
The default settings which are set on the ELB HC work well but there are cases when it would be better to tweak its parameters -- for example, faster detection of unhealthy backends. This PR makes it possible to override any of the healthcheck's parameters via annotations on the Service, with the exception of the Target setting which continues to be inferred from the Service's spec.

**Release note**:
```release-note
It is now possible to override the healthcheck parameters for AWS ELBs via annotations on the corresponding service. The new annotations are `healthy-threshold`, `unhealthy-threshold`, `timeout`, `interval` (all prefixed with `service.beta.kubernetes.io/aws-load-balancer-healthcheck-`)
```

2017-11-22 08:48:43 -08:00

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