update examples/cassandra to v1

examples/cassandra/cassandra-controller.yaml

-apiVersion: v1beta3
+apiVersion: v1
 kind: ReplicationController
 metadata:
   labels:
@@ -24,7 +24,7 @@ spec:
               value: 512M
             - name: HEAP_NEWSIZE
               value: 100M
-          image: gcr.io/google_containers/cassandra:v3
+          image: gcr.io/google_containers/cassandra:v4
           name: cassandra
           ports:
             - containerPort: 9042

examples/cassandra/cassandra-service.yaml

-apiVersion: v1beta3
+apiVersion: v1
 kind: Service
 metadata:
   labels:
@@ -7,6 +7,5 @@ metadata:
 spec:
   ports:
     - port: 9042
-      targetPort: 9042
   selector:
     name: cassandra

examples/cassandra/cassandra.yaml

-apiVersion: v1beta3
+apiVersion: v1
 kind: Pod
 metadata:
   labels:
@@ -11,7 +11,7 @@ spec:
     resources:
       limits:
         cpu: "1"      
-    image: gcr.io/google_containers/cassandra:v3
+    image: gcr.io/google_containers/cassandra:v4
     name: cassandra
     ports:
     - name: cql

examples/cassandra/java/src/io/k8s/cassandra/KubernetesSeedProvider.java

@@ -102,7 +102,7 @@ public class KubernetesSeedProvider implements SeedProvider {
         List<InetAddress> list = new ArrayList<InetAddress>();
         String host = "https://kubernetes.default.cluster.local";
         String serviceName = getEnvOrDefault("CASSANDRA_SERVICE", "cassandra");
-        String path = "/api/v1beta3/namespaces/default/endpoints/";
+        String path = "/api/v1/namespaces/default/endpoints/";
         try {
             String token = getServiceAccountToken();