Revert k8s.gcr.io vanity domain

This reverts commit eba5b6092a.

Fixes https://github.com/kubernetes/kubernetes/issues/57526

examples/storage/cassandra/image/Dockerfile

@@ -12,7 +12,7 @@
 # See the License for the specific language governing permissions and
 # limitations under the License.
 
-FROM k8s.gcr.io/ubuntu-slim:0.9
+FROM gcr.io/google_containers/ubuntu-slim:0.9
 
 ARG BUILD_DATE
 ARG VCS_REF

examples/storage/redis/redis-controller.yaml

@@ -13,7 +13,7 @@ spec:
     spec:
       containers:
       - name: redis
-        image: k8s.gcr.io/redis:v1
+        image: gcr.io/google_containers/redis:v1
         ports:
         - containerPort: 6379
         resources:

examples/storage/redis/redis-master.yaml

@@ -9,7 +9,7 @@ metadata:
 spec:
   containers:
     - name: master
-      image: k8s.gcr.io/redis:v1
+      image: gcr.io/google_containers/redis:v1
       env:
         - name: MASTER
           value: "true"

examples/storage/redis/redis-sentinel-controller.yaml

@@ -15,7 +15,7 @@ spec:
     spec:
       containers:
       - name: sentinel
-        image: k8s.gcr.io/redis:v1
+        image: gcr.io/google_containers/redis:v1
         env:
           - name: SENTINEL
             value: "true"

examples/storage/rethinkdb/admin-pod.yaml

@@ -7,7 +7,7 @@ metadata:
   name: rethinkdb-admin
 spec:
   containers:
-  - image: k8s.gcr.io/rethinkdb:1.16.0_1
+  - image: gcr.io/google_containers/rethinkdb:1.16.0_1
     name: rethinkdb
     env:
     - name: POD_NAMESPACE

examples/storage/rethinkdb/rc.yaml

@@ -16,7 +16,7 @@ spec:
         role: replicas
     spec:
       containers:
-      - image: k8s.gcr.io/rethinkdb:1.16.0_1
+      - image: gcr.io/google_containers/rethinkdb:1.16.0_1
         name: rethinkdb
         env:
         - name: POD_NAMESPACE