Add Barbican integration

This patch adds Barbican integration to Cinder

Change-Id: Idcae88e485ac32bdb013807ea88aaf0ce18f6b3f
Related-PROD: PROD-15205
diff --git a/README.rst b/README.rst
index 99a4ffe..1dc3850 100644
--- a/README.rst
+++ b/README.rst
@@ -62,6 +62,8 @@
         audit:
           enabled: false
         osapi_max_limit: 500
+        barbican:
+          enabled: true
 
     cinder:
       volume:
@@ -109,6 +111,8 @@
             pool: SAS7K2
         audit:
           enabled: false
+        barbican:
+          enabled: true
 
 
 Enable CORS parameters
@@ -671,6 +675,14 @@
             key:
               conn_speed: fibre-10G
 
+Enable Barbican integration
+
+.. code-block:: yaml
+
+    cinder:
+      controller:
+        barbican:
+          enabled: true
 
 Documentation and Bugs
 ============================