update mysql-wordpress example to use v1beta3 API

examples/mysql-wordpress-pd/mysql.yaml

@@ -1,32 +1,31 @@
-apiVersion: v1beta1
-id: mysql
-desiredState:
-  manifest:
-    version: v1beta1
-    id: mysql
-    containers:
-      - name: mysql
-        image: mysql
-        env:
-          - name: MYSQL_ROOT_PASSWORD
-            # change this
-            value: yourpassword
-        cpu: 100
-        ports:
-          - containerPort: 3306
-        volumeMounts:
-            # name must match the volume name below
-          - name: mysql-persistent-storage
-            # mount path within the container
-            mountPath: /var/lib/mysql
-    volumes:
-      - name: mysql-persistent-storage
-        source:
-          # emptyDir: {}
-          persistentDisk:
-            # This GCE PD must already exist.
-            pdName: mysql-disk
-            fsType: ext4
-labels:
-  name: mysql
+apiVersion: v1beta3
 kind: Pod
+metadata:
+  name: mysql
+  labels: 
+    name: mysql
+spec: 
+  containers: 
+    - resources:
+        limits :
+          cpu: 1
+      image: mysql
+      name: mysql
+      env:
+        - name: MYSQL_ROOT_PASSWORD
+          # change this
+          value: yourpassword
+      ports: 
+        - containerPort: 3306
+          name: mysql
+      volumeMounts:
+          # name must match the volume name below
+        - name: mysql-persistent-storage
+          # mount path within the container
+          mountPath: /var/lib/mysql
+  volumes:
+    - name: mysql-persistent-storage
+      gcePersistentDisk:
+        # This GCE PD must already exist.
+        pdName: mysql-disk
+        fsType: ext4