Merge pull request #8137 from zalando-incubator/container-registry.zalando.net/teapot/etcd-proxy

etcd-proxy: Update to version master-12

Author: linki

cluster/manifests/emergency-access-service/deployment.yaml

@@ -28,7 +28,7 @@ spec:
       serviceAccountName: emergency-access-service
       containers:
       - name: apiserver-proxy
-        image: container-registry.zalando.net/teapot/etcd-proxy:master-11
+        image: container-registry.zalando.net/teapot/etcd-proxy:master-12
         args:
         - "--listen-address"
         - "127.0.0.1:333"