Fix Node/Cluster dashboards for node-exporter v0.16.0

[emcfarlane]

[foxdalas]

@afking Nice fix. Big thanks

[Sanwel]

Have some question, not all query have 'node=$node' as selector, and I need to change it manually to 'kubernetes_node=$node'. Is there any point to make pull request with such changes?

[emcfarlane]

@Sanwel which queries are you having issues with?

[neufeldtech]

Any word on the status of getting this merged into master? It would be great to see the node dashboard fixed up for the node-exporter 0.16.0

[CiaranCurran]

@afking thanks for the fix, however, I am still having same issue mentioned by @Sanwel

In the k8s cluster dashboard the cluster disk usage and cluster disk capacity panels the node=$node query does not work as the nodes are referenced by 'kuberenetes_node' instead, which I have to set manually.

[phedoreanu]

@afking It would be great to have this merged!