Use route rules in istio file directly. (#1581)

We have created the files in istio already at
https://github.com/istio/istio/pull/6102 , so there is no need
to create the file again.

content/docs/tasks/policy-enforcement/rate-limiting.md

@@ -25,35 +25,10 @@ service.
   $ istioctl create -f @samples/bookinfo/routing/route-rule-all-v1.yaml@
   ```
 
-  Save the following YAML snippet as `route-rule-reviews-jason-v2-v3.yaml`:
-
-  ```yaml
-  apiVersion: networking.istio.io/v1alpha3
-  kind: VirtualService
-  metadata:
-    name: reviews
-  spec:
-    hosts:
-      - reviews
-    http:
-    - match:
-      - headers:
-          cookie:
-            regex: "^(.*?;)?(user=jason)(;.*)?$"
-      route:
-      - destination:
-          host: reviews
-          subset: v2
-    - route:
-      - destination:
-          host: reviews
-          subset: v3
-  ```
-
   and then run the following command:
 
   ```command
-  $ istioctl replace -f route-rule-reviews-jason-v2-v3.yaml
+  $ istioctl replace -f @samples/bookinfo/routing/route-rule-reviews-jason-v2-v3.yaml.yaml@
   ```
 
 > If you have a conflicting rule that you set in previous tasks,

content/docs/tasks/security/basic-access-control.md

@@ -23,35 +23,10 @@ This task shows how to control access to a service using the Kubernetes labels.
     $ istioctl create -f @samples/bookinfo/routing/route-rule-all-v1.yaml@
     ```
 
-    Save the following YAML snippet as `route-rule-reviews-jason-v2-v3.yaml`:
-
-    ```yaml
-        apiVersion: networking.istio.io/v1alpha3
-        kind: VirtualService
-        metadata:
-          name: reviews
-        spec:
-          hosts:
-          - reviews
-          http:
-          - match:
-            - headers:
-                cookie:
-                  regex: "^(.*?;)?(user=jason)(;.*)?$"
-            route:
-            - destination:
-                host: reviews
-                subset: v2
-          - route:
-            - destination:
-                host: reviews
-                subset: v3
-    ```
-
     and then run the following command:
 
     ```command
-    $ istioctl replace -f route-rule-reviews-jason-v2-v3.yaml
+    $ istioctl replace -f @samples/bookinfo/routing/route-rule-reviews-jason-v2-v3.yaml.yaml@
     ```
 
     > If you have conflicting rules that you set in previous tasks,