fix Deployments in examples for apps/v1 selector requirement (#1684)

The apps/v1 API makes the selector in Deployments a required property.

Signed-off-by: Adnan Abdulhussein <aadnan@vmware.com>

examples/minio/00-minio-deployment.yaml

@@ -29,6 +29,9 @@ metadata:
 spec:
   strategy:
     type: Recreate
+  selector:
+    matchLabels:
+      component: minio
   template:
     metadata:
       labels:

examples/nginx-app/base.yaml

@@ -28,6 +28,9 @@ metadata:
   namespace: nginx-example
 spec:
   replicas: 2
+  selector:
+    matchLabels:
+      app: nginx
   template:
     metadata:
       labels:

examples/nginx-app/with-pv.yaml

@@ -44,6 +44,9 @@ metadata:
   namespace: nginx-example
 spec:
   replicas: 1
+  selector:
+    matchLabels:
+      app: nginx
   template:
     metadata:
       labels: