Automatic merge from submit-queue (batch tested with PRs 65730, 66615, 66684, 66519, 66510). If you want to cherry-pick this change to another branch, please follow the instructions <a href="https://github.com/kubernetes/community/blob/master/contributors/devel/cherry-picks.md">here</a>.
kubelet: add image-gc low/high validation check
Currently, there is no protection against setting the high watermark <= the low watermark for image GC
This PR adds a validation rule for that.
@smarterclayton
94c2c6c842