Add `minho-k8s` service

[jbonofre]

The idea is to create a Kubernetes client as a service in the registry.

Then, other services can get the client from the registry and interact with k8s.

[mattrpav]

Did you have an existing client library in mind?

[jbonofre]

Yeah the one from Fabric8 is pretty good.

[mattrpav]

Yeah the one from Fabric8 is pretty good.

+1

It has good multi-version support and using the jdk-based http client would cut out a nice chunk of the transitive deps.

ref: https://github.com/fabric8io/kubernetes-client/tree/master/httpclient-jdk