[discovery] Resource lookup is case-sensitive while it shouldn't

[Jean-Daniel]

What happened (please include outputs or screenshots):

The following code fails with a resource not found error.

kubernetes.config.load_kube_config()
with kubernetes.client.ApiClient() as client:
  v1 = kubernetes.dynamic.DynamicClient(client)
  rsrc = v1.resources.get(kind='service')

What you expected to happen:

That it returns the Service resource, just like Kubernetes API and kubectl does.

How to reproduce it (as minimally and precisely as possible):

Run the above snippet

[roycaihw]

/assign @Kevinz857

[k8s-ci-robot]

@roycaihw: GitHub didn't allow me to assign the following users: Kevinz857.

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In response to this:

/assign @Kevinz857

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