Policy.json should be defined by user

User can override and add values to policy.json by creating flat
key-value structure under neutron:server:policy.

Change-Id: I62dc05832a124b361a8d608326cbc6168af754c8
diff --git a/README.rst b/README.rst
index 23072ae..e8e633f 100644
--- a/README.rst
+++ b/README.rst
@@ -59,6 +59,20 @@
 because a single request may fail (timeout). This is enabled with both
 parameters *allow_pagination* and *pagination_max_limit* as shown above.
 
+
+Configuration of policy.json file
+
+.. code-block:: yaml
+
+    neutron:
+      server:
+        ....
+        policy:
+          create_subnet: 'rule:admin_or_network_owner'
+          'get_network:queue_id': 'rule:admin_only'
+          # Add key without value to remove line from policy.json
+          'create_network:shared':
+
 Neutron lbaas provides on the controller node
 
 .. code-block:: yaml