Release version 2.2.1

Change-Id: Icd01ec35cef1c321cc60086a1db141f7b3fd46a4
diff --git a/app/pom.xml b/app/pom.xml
index 96c53d3..209a006 100644
--- a/app/pom.xml
+++ b/app/pom.xml
@@ -20,7 +20,7 @@
     <parent>
         <artifactId>dhcpl2relay</artifactId>
         <groupId>org.opencord</groupId>
-        <version>2.2.1-SNAPSHOT</version>
+        <version>2.2.1</version>
     </parent>
     <modelVersion>4.0.0</modelVersion>