k8s.io/apiserver: make maxRetryWhenPatchConflicts public
k8s.io/apiserver: make maxRetryWhenPatchConflicts public

Kubernetes-commit: be6be1370b5d1c9b6269c24f663426e3bac93c72

caesarxuchao/apiserver,caesarxuchao/apiserver,kubernetes/apiserver,kubernetes/apiserver,caesarxuchao/apiserver