Release app version 2.4.0 with API version 2.4.0

Change-Id: I44725997aec36f2c0c3a6c4ecf8596bbba9b472d
diff --git a/app/pom.xml b/app/pom.xml
index afce28a..66874e3 100644
--- a/app/pom.xml
+++ b/app/pom.xml
@@ -20,7 +20,7 @@
     <parent>
         <artifactId>onos-app-igmpproxy</artifactId>
         <groupId>org.opencord</groupId>
-        <version>2.4.0-SNAPSHOT</version>
+        <version>2.4.0</version>
         <relativePath>../pom.xml</relativePath>
     </parent>
     <modelVersion>4.0.0</modelVersion>