Automatic merge from submit-queue
Add validation for affinities and taints/tolerations annotations.
It fixes annotations validation issues for pod/node affinities and taints/tolerations annotations for 1.5 to 1.6 upgrade tests as discussed in the issue https://github.com/kubernetes/kubernetes/issues/43228 .
@davidopp @derekwaynecarr @kubernetes/sig-scheduling-pr-reviews