Support for Patch across multiple data nodes

- Added new method updateMultipleDataLeaves to perform Update on
  multiple data nodes
- Deprecated singular method of update data node(updateDataLeaves)
- Refactored code where singular version was used
- Updated release notes

Issue-ID: CPS-1006
Signed-off-by: <as00745003@techmahindra.com>
Change-Id: If67280e2dd3ad566de9a8217489f168415e624bc
diff --git a/docs/release-notes.rst b/docs/release-notes.rst
index d662023..0b2d2a4 100755
--- a/docs/release-notes.rst
+++ b/docs/release-notes.rst
@@ -43,7 +43,7 @@
 
 Features
 --------
-    - None
+    - `CPS-1006 <https://jira.onap.org/browse/CPS-1006>`_ Extend CPS PATCH API to allow update of leaves for multiple data nodes
 
 Version: 3.3.1
 ==============