kubecfg uses obsolete swaggerapi, removed in client-go v6.0.0

[prydonius]

We cannot easily update kubecfg to use the latest client-go release (v6.0.0) as they have removed the Swagger 1.2 retriever functions, which we rely on for validation.

See https://github.com/kubernetes/client-go/blob/master/CHANGELOG.md#v600 and kubernetes/kubernetes#53441 for more info.

In order to update, we will need to reimplement where we're using Swagger with the OpenAPI functions.

cc @anguslees @ngtuna

[anguslees]

This was fixed in #215