Add scenario "Arbitary File Access via Subpath Volume"

[myugan]

References :

• CVE-2017-1002101 - subpath volume mount handling allows arbitrary file access in host filesystem kubernetes/kubernetes#60813
• https://kubernetes.io/blog/2018/04/04/fixing-subpath-volume-vulnerability

[madhuakula]

Hey @myugan

Thanks for the request. I also have some scenarios wanted to build and couldn't as it doesn't support all the Kubernetes environments. Like some scenarios required specific cluster version and configuration. I think this scenario looks possible, let me try and see if i can add this. Else, I will try to at least add documentation and steps to perform with screenshots for learning purposes.

Feel free to make a PR :)

Thanks again!