Supports CNI version 0.4.0

[zshi-redhat]

What would you like to be added?

Implements cmdCheck to support CNI version 0.4.0

What is the use case for this feature / enhancement?

Add periodic check for sriov network by implementing cmdCheck

Example from Multus CNI: https://github.com/intel/multus-cni/pull/427/files
cmdCheck spec update ref: https://github.com/containernetworking/cni/pull/579/files

[zshi-redhat]

Discussed in Monday's resource mgmt meeting.
Agreed that it may be worth implementing cmdCheck in sriov-cni, to check whether VF properties have been successfully applied and not changed during the pod lifecycle.