CPS Delta API 2: Delta between anchor and payload

  - Second API to get Delta between an anchor and JSON payload
  - added new API getDeltaByDataspaceAnchorAndPayload
  - added controller and service layer methods
    getDeltaByDataspaceAnchorAndPayload
  - Core Delta algorithm remains same as the first API.
    getDeltaByDataspaceAnchorAndPayload will call getDeltaBetweenDataNodes

Issue-ID: CPS-1836
Signed-off-by: Arpit Singh <as00745003@techmahindra.com>
Change-Id: Id74cd930ce48e5cb414aa62c5381b79675788a37
diff --git a/docs/release-notes.rst b/docs/release-notes.rst
index 82a890d..b9df799 100644
--- a/docs/release-notes.rst
+++ b/docs/release-notes.rst
@@ -70,6 +70,8 @@
 
 Features
 --------
+3.4.9
+    - `CPS-1836 <https://jira.onap.org/browse/CPS-1836>`_ Delta between anchor and JSON payload.
 
 Version: 3.4.8
 ==============