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-rest/pom.xml b/cps-rest/pom.xml
index 394a992..37b3e46 100755
--- a/cps-rest/pom.xml
+++ b/cps-rest/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>