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Update Kubernetes version to v1.19.15, the latest patch release of the earliest supported version (as of 2021-09-15). Change-Id: Ia8f398098dfafa7fc029c982c71bce4a876668de
Update Kubernetes version to v1.19.15, the latest patch release of the earliest supported version (as of 2021-09-15). Change-Id: Ia8f398098dfafa7fc029c982c71bce4a876668de