adding two files for mtls demo

Author: burrsutter

istiofiles/authentication-enable-tls.yml

@@ -0,0 +1,8 @@
+apiVersion: "authentication.istio.io/v1alpha1"
+kind: "Policy"
+metadata:
+  name: "default"
+  namespace: "tutorial"
+spec:
+  peers:
+  - mtls: {}

istiofiles/destination-rule-tls.yml

@@ -0,0 +1,10 @@
+apiVersion: "networking.istio.io/v1alpha3"
+kind: "DestinationRule"
+metadata:
+  name: "default"
+  namespace: "tutorial"
+spec:
+  host: "*.tutorial.svc.cluster.local"
+  trafficPolicy:
+    tls:
+      mode: ISTIO_MUTUAL