Add 'backend_host' support for Fujitsu backend

Related-Prod: PROD-35777
Change-Id: Icfd8d23d68005881448f610dd2df183c1ef51df6
diff --git a/README.rst b/README.rst
index 8e7385e..6e4739b 100644
--- a/README.rst
+++ b/README.rst
@@ -506,7 +506,7 @@
             type_name: 10kThinPro
             engine: fujitsu
             pool: 10kThinPro
-            host: 192.168.0.1
+            backend_host: cinder-vip
             port: 5988
             user: username
             password: pass