Bump CPS version to 3.1.5-SNAPSHOT

- Bumped the version to 3.1.5-snapshot and updated the version
  properties file

Issue-ID: CPS-1325
Change-Id: I61848166b94a5ce14651f2d0fe42e4cc39f5c5e2
Signed-off-by: mpriyank <priyank.maheshwari@est.tech>
diff --git a/docs/release-notes.rst b/docs/release-notes.rst
index 1a3bcbc..026f05b 100755
--- a/docs/release-notes.rst
+++ b/docs/release-notes.rst
@@ -16,6 +16,30 @@
 ..      * * *   KOHN   * * *
 ..      ====================
 
+Version: 3.1.5 (not yet released)
+=================================
+
+Release Data
+------------
+
++--------------------------------------+--------------------------------------------------------+
+| **CPS Project**                      |                                                        |
+|                                      |                                                        |
++--------------------------------------+--------------------------------------------------------+
+| **Docker images**                    | onap/cps-and-ncmp:3.1.5                                |
+|                                      |                                                        |
++--------------------------------------+--------------------------------------------------------+
+| **Release designation**              | 3.1.5 Kohn                                             |
+|                                      |                                                        |
++--------------------------------------+--------------------------------------------------------+
+| **Release date**                     | (not yet released)                                     |
+|                                      |                                                        |
++--------------------------------------+--------------------------------------------------------+
+
+Bug Fixes
+---------
+   - None
+
 Version: 3.1.4
 ==============
 
@@ -32,7 +56,7 @@
 | **Release designation**              | 3.1.4 Kohn                                             |
 |                                      |                                                        |
 +--------------------------------------+--------------------------------------------------------+
-| **Release date**                     | (yet to release)                                       |
+| **Release date**                     | 2022 October 5                                         |
 |                                      |                                                        |
 +--------------------------------------+--------------------------------------------------------+