Display resource usage in namespace overview

[dbadura]

Description

The namespace overview should have two charts with current resource status:

• one with all limits from all pods in given namespace compared to the current resource usage taken from metrics server.
• one with all requests from all pods in given namespace compared to the current resource usage taken from metrics server.

Remove current resource quota charts as they are not needed.

Reasons

Current resource quota charts display not very precise information about current cluster status.
It would be more usefull to see current utilization vs pod resources.

Attachments

The resource usage can be fetched by kubectl top pod.
Run kubectl -v 10 top pod to see what information is fetched from api server.

[mrCherry97]

We need to discuss, because could resolved #3016