Upgrading kubernetes API

Change-Id: I279db986e2dab1ebcb5b48b4195363af395c8de3
diff --git a/mcord/mcord-cdn-local-free/templates/nginx.yaml b/mcord/mcord-cdn-local-free/templates/nginx.yaml
index 49abe46..ea08f03 100644
--- a/mcord/mcord-cdn-local-free/templates/nginx.yaml
+++ b/mcord/mcord-cdn-local-free/templates/nginx.yaml
@@ -35,13 +35,17 @@
     protocol: TCP
 
 ---
-apiVersion: apps/v1beta1
+apiVersion: apps/v1
 kind: StatefulSet
 metadata:
   name: nginx-rtmp
 spec:
   serviceName: nginx-rtmp
   replicas: {{ .Values.nginx.replicas}}
+  selector:
+    matchLabels:
+      name: nginx-rtmp
+      release: {{ .Release.Name }}
   template:
     metadata:
       labels: