Bump policy/models to 2.3.1-SNAPSHOT

Issue-ID: POLICY-2695
Change-Id: I64473cc81ae48942010472f15faac75c13cb0b7d
Signed-off-by: Ram Krishna Verma <ram_krishna.verma@bell.ca>
diff --git a/pom.xml b/pom.xml
index 5354768..320f3c5 100644
--- a/pom.xml
+++ b/pom.xml
@@ -33,7 +33,7 @@
 
     <groupId>org.onap.policy.models</groupId>
     <artifactId>policy-models</artifactId>
-    <version>2.3.0-SNAPSHOT</version>
+    <version>2.3.1-SNAPSHOT</version>
 
     <packaging>pom</packaging>
     <name>policy-models</name>