Bump policy-apex-pdp to 2.3.1-SNAPSHOT

Change-Id: I59b93fccb0f3a41f8db753d1e8e2978bbb51e9a0
Issue-ID: POLICY-2378
Signed-off-by: a.sreekumar <ajith.sreekumar@est.tech>
diff --git a/model/event-model/pom.xml b/model/event-model/pom.xml
index ffce662..fa8c73b 100644
--- a/model/event-model/pom.xml
+++ b/model/event-model/pom.xml
@@ -22,7 +22,7 @@
     <parent>
         <groupId>org.onap.policy.apex-pdp.model</groupId>
         <artifactId>model</artifactId>
-        <version>2.3.0-SNAPSHOT</version>
+        <version>2.3.1-SNAPSHOT</version>
     </parent>
 
     <artifactId>event-model</artifactId>
@@ -79,4 +79,4 @@
             </distributionManagement>
         </profile>
     </profiles>
-</project>
\ No newline at end of file
+</project>