Skip lease with empty holder #2378

Job	Run time
Unit Test (knative/serving)	9m 42s
Unit Test (knative/networking)	4m 15s
Unit Test (knative/eventing)	13m 7s
Unit Test (knative/operator)	7m 15s
Unit Test (knative/client)	7m 5s
Unit Test (knative-extensions/eventing-autoscaler-keda)	4m 45s
Unit Test (knative-extensions/eventing-ceph)	4m 41s
Unit Test (knative-extensions/eventing-github)	5m 30s
Unit Test (knative-extensions/eventing-gitlab)	5m 6s
Unit Test (knative-extensions/eventing-kafka)	7m 8s
Unit Test (knative-extensions/eventing-kafka-broker)	11m 18s
Unit Test (knative-extensions/eventing-rabbitmq)	10m 22s
Unit Test (knative-extensions/eventing-redis)	5m 51s
Unit Test (knative-extensions/kn-plugin-admin)	4m 52s
Unit Test (knative-extensions/net-certmanager)	4m 43s
Unit Test (knative-extensions/net-contour)	4m 25s
Unit Test (knative-extensions/net-istio)	5m 51s
Unit Test (knative-extensions/net-kourier)	4m 25s
	2h 0m 21s

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