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/cps-service/pom.xml b/cps-service/pom.xml
index 574a54b..51cf324 100644
--- a/cps-service/pom.xml
+++ b/cps-service/pom.xml
@@ -28,7 +28,7 @@
   <parent>
     <groupId>org.onap.cps</groupId>
     <artifactId>cps-parent</artifactId>
-    <version>3.1.4-SNAPSHOT</version>
+    <version>3.1.5-SNAPSHOT</version>
     <relativePath>../cps-parent/pom.xml</relativePath>
   </parent>