Downloadable examples for “Run applications” section (#14147)

* Move examples ahead of commands that use them

In support of https://github.com/kubernetes/website/issues/12740

The aim is to adopt a consistent style around providing downloadable
examples for use with kubectl, etc.

* Tweak wording for stateful app pod example

* Adopt formatting conventions for code blocks

* Move ReplicationController sample YAML to examples

In aid of https://github.com/kubernetes/website/issues/12740

* Move PodDisruptionBudget sample YAML to examples

In aid of https://github.com/kubernetes/website/issues/12740

* Update test schema for new examples

* Use Unicode ellipsis in example

Aim here is to make the elision more obvious

content/en/examples/controllers/replication-nginx-1.7.9.yaml

@@ -0,0 +1,16 @@
+apiVersion: v1
+kind: ReplicationController
+metadata:
+  name: my-nginx
+spec:
+  replicas: 5
+  template:
+    metadata:
+      labels:
+        app: nginx
+    spec:
+      containers:
+      - name: nginx
+        image: nginx:1.7.9
+        ports:
+        - containerPort: 80

content/en/examples/controllers/replication-nginx-1.9.2.yaml

@@ -0,0 +1,21 @@
+apiVersion: v1
+kind: ReplicationController
+metadata:
+  name: my-nginx-v4
+spec:
+  replicas: 5
+  selector:
+    app: nginx
+    deployment: v4
+  template:
+    metadata:
+      labels:
+        app: nginx
+        deployment: v4
+    spec:
+      containers:
+      - name: nginx
+        image: nginx:1.9.2
+        args: ["nginx", "-T"]
+        ports:
+        - containerPort: 80

content/en/examples/examples_test.go

@@ -415,13 +415,15 @@ func TestExampleObjectSchemas(t *testing.T) {
 			"configmap-multikeys": {&api.ConfigMap{}},
 		},
 		"controllers": {
-			"daemonset":        {&apps.DaemonSet{}},
-			"frontend":         {&apps.ReplicaSet{}},
-			"hpa-rs":           {&autoscaling.HorizontalPodAutoscaler{}},
-			"job":              {&batch.Job{}},
-			"replicaset":       {&apps.ReplicaSet{}},
-			"replication":      {&api.ReplicationController{}},
-			"nginx-deployment": {&apps.Deployment{}},
+			"daemonset":               {&apps.DaemonSet{}},
+			"frontend":                {&apps.ReplicaSet{}},
+			"hpa-rs":                  {&autoscaling.HorizontalPodAutoscaler{}},
+			"job":                     {&batch.Job{}},
+			"replicaset":              {&apps.ReplicaSet{}},
+			"replication":             {&api.ReplicationController{}},
+			"replication-nginx-1.7.9": {&api.ReplicationController{}},
+			"replication-nginx-1.9.2": {&api.ReplicationController{}},
+			"nginx-deployment":        {&apps.Deployment{}},
 		},
 		"debug": {
 			"counter-pod":                     {&api.Pod{}},
@@ -523,9 +525,11 @@ func TestExampleObjectSchemas(t *testing.T) {
 			"redis":     {&api.Pod{}},
 		},
 		"policy": {
-			"privileged-psp": {&policy.PodSecurityPolicy{}},
-			"restricted-psp": {&policy.PodSecurityPolicy{}},
-			"example-psp":    {&policy.PodSecurityPolicy{}},
+			"privileged-psp":                                 {&policy.PodSecurityPolicy{}},
+			"restricted-psp":                                 {&policy.PodSecurityPolicy{}},
+			"example-psp":                                    {&policy.PodSecurityPolicy{}},
+			"zookeeper-pod-disruption-budget-maxunavailable": {&policy.PodDisruptionBudget{}},
+			"zookeeper-pod-disruption-budget-minunavailable": {&policy.PodDisruptionBudget{}},
 		},
 		"service": {
 			"nginx-service": {&api.Service{}},

content/en/examples/policy/zookeeper-pod-disruption-budget-maxunavailable.yaml

@@ -0,0 +1,9 @@
+apiVersion: policy/v1beta1
+kind: PodDisruptionBudget
+metadata:
+  name: zk-pdb
+spec:
+  maxUnavailable: 1
+  selector:
+    matchLabels:
+      app: zookeeper

content/en/examples/policy/zookeeper-pod-disruption-budget-minavailable.yaml

@@ -0,0 +1,9 @@
+apiVersion: policy/v1beta1
+kind: PodDisruptionBudget
+metadata:
+  name: zk-pdb
+spec:
+  minAvailable: 2
+  selector:
+    matchLabels:
+      app: zookeeper