Cvmfs csi: compatibility with k8s 1.20+

Dear all,

( this is also posted in: compatibility with k8s 1.20 · Issue #38 · cernops/cvmfs-csi · GitHub )

We have been running cvmfs-sci successfully on 1.19. It does not run any more on 1.20 due to

unexpected error getting claim reference: selfLink was empty, can't make reference

Looks like this is because of this:

Is anyone running CVMFS CSI on kubernetes 1.20+ and how ?

Thanks in advance