Merge release1.15 into master (#16512)

* initial commit

* promote AWS-NLB Support from alpha to beta (#14451) (#16459) (#16484)

* 1. Sync release-1.15 into master
2. Sync with en version

* 1. Add the lost yaml file.

content/zh/examples/application/deployment.yaml

@@ -0,0 +1,19 @@
+apiVersion: apps/v1 # for versions before 1.9.0 use apps/v1beta2
+kind: Deployment
+metadata:
+  name: nginx-deployment
+spec:
+  selector:
+    matchLabels:
+      app: nginx
+  replicas: 2 # tells deployment to run 2 pods matching the template
+  template:
+    metadata:
+      labels:
+        app: nginx
+    spec:
+      containers:
+      - name: nginx
+        image: nginx:1.7.9
+        ports:
+        - containerPort: 80