add Kubernetes context

Merged Johann Dreo requested to merge github/fork/mschuett/feature/kube-context into master

Created by: mschuett

This commit adds the current Kubernetes context to the prompt (matches feature request #559 (closed)).

I am not that good with shell programming and I have the feeling the unconditional call to _lp_kube_context could be handled more elegantly. So any suggestions for improvements are welcome.

Merge request reports