Add generated file

This PR adds generated files under pkg/client and vendor folder.

vendor/k8s.io/kubernetes/cluster/images/etcd-version-monitor/README.md

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+# etcd-version-monitor
+
+This is a tool for exporting etcd metrics and supplementing them with etcd
+server binary version and cluster version. These metrics are in
+prometheus format and can be scraped by a prometheus server.
+The metrics are exposed at the http://localhost:9101/metrics endpoint.
+
+For etcd 3.1+, the
+[go-grpc-prometheus](https://github.com/grpc-ecosystem/go-grpc-prometheus)
+metrics format, which backward incompatibly replaces the 3.0 legacy grpc metric
+format, is exposed in both the 3.1 format and in the 3.0. This preserves
+backward compatibility.
+
+For etcd 3.1+, the `--metrics=extensive` must be set on etcd for grpc request
+latency metrics (`etcd_grpc_unary_requests_duration_seconds`) to be exposed.
+
+**RUNNING THE TOOL**
+
+To run this tool as a docker container:
+- make build
+- docker run --net=host -i -t k8s.gcr.io/etcd-version-monitor:test /etcd-version-monitor --logtostderr
+
+To run this as a pod on the kubernetes cluster:
+- Place the 'etcd-version-monitor.yaml' in the manifests directory of
+  kubelet on the master machine.
+
+*Note*: This tool has to run on the same machine as etcd, as communication
+with etcd is over localhost.
+
+**VERIFYING THE TOOL**
+
+- Goto [http://localhost:9101/metrics](http://localhost:9101/metrics) in order to view the exported metrics.
+- The metrics prefixed with "etcd_" are the ones of interest to us.