Added possibility to manage  use_db_reconnect option for Nova

PROD-34776

Change-Id: I259787a37d5b7f3a7fd762c12f5f86ac8a588fa3
diff --git a/README.rst b/README.rst
index 932b96e..b111d84 100644
--- a/README.rst
+++ b/README.rst
@@ -1404,6 +1404,23 @@
             until_refresh: 0
             max_age: 0
 
+Set use_db_reconnect for Nova
+========
+
+.. code-block:: yaml
+
+    nova:
+      controller:
+        database:
+          use_db_reconnect: true
+
+.. code-block:: yaml
+
+    nova:
+      compute:
+        database:
+          use_db_reconnect: true
+
 Upgrades
 ========