Change spark example to use v1

examples/spark/spark-master-service.json

 {
   "kind": "Service",
-  "apiVersion": "v1beta3",
+  "apiVersion": "v1",
   "metadata": {
     "name": "spark-master",
     "labels": {
@@ -18,4 +18,4 @@
       "name": "spark-master"
     }
   }
-}
\ No newline at end of file
+}

examples/spark/spark-master.json

 {
   "kind": "Pod",
-  "apiVersion": "v1beta3",
+  "apiVersion": "v1",
   "metadata": {
     "name": "spark-master",
     "labels": {
@@ -25,4 +25,4 @@
       }
     ]
   }
-}
\ No newline at end of file
+}

examples/spark/spark-worker-controller.json

 {
   "kind": "ReplicationController",
-  "apiVersion": "v1beta3",
+  "apiVersion": "v1",
   "metadata": {
     "name": "spark-worker-controller",
     "labels": {
@@ -40,4 +40,4 @@
       }
     }
   }
-}
\ No newline at end of file
+}