Release app version 2.4.0 with API version 2.4.0

Change-Id: Ic9b821ea9101ed1d61afe1bcbac6208b9c0ccd24
diff --git a/app/pom.xml b/app/pom.xml
index 4137aed..38220aa 100644
--- a/app/pom.xml
+++ b/app/pom.xml
@@ -20,7 +20,7 @@
     <parent>
         <artifactId>dhcpl2relay</artifactId>
         <groupId>org.opencord</groupId>
-        <version>2.4.0-SNAPSHOT</version>
+        <version>2.4.0</version>
     </parent>
     <modelVersion>4.0.0</modelVersion>