Automatic merge from submit-queue (batch tested with PRs 49898, 49897, 49919, 48860, 49491) Fix duplicate metrics collector registration attempted error Fixes "duplicate metrics collector registration attempted" error seen in https://k8s-gubernator.appspot.com/build/kubernetes-jenkins/pr-logs/pull/batch/pull-kubernetes-unit/43931/
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converted to vendor k8s components.