Keystone configures parameter of admin project.

By default admin_project_name and admin_project_domain_name are undefined.
This affects Heat client while listing the stacks. For any user having
admin rights in the tenant, all stacks across the entire cloud are shown.

Change-Id: I15f2c10ba7b7495c2e3eb4e9acccab957d86c883
Closes-Bug: #14974
diff --git a/README.rst b/README.rst
index bb7146f..89593bd 100644
--- a/README.rst
+++ b/README.rst
@@ -664,6 +664,18 @@
         policy:
           admin_or_token_subject: 'rule:admin_required or rule:token_subject'
 
+Setting up default admin project name and domain
+
+.. code-block:: yaml
+
+
+    keystone:
+      server:
+        ....
+        admin_project:
+          name: "admin"
+          domain: "default"
+
 Usage
 =====