Release version 2.2.0

Change-Id: I7c2fb00e9bb3953e404eaa053e77143e89cbc3a9
diff --git a/api/pom.xml b/api/pom.xml
index 7f1e957..41f5555 100644
--- a/api/pom.xml
+++ b/api/pom.xml
@@ -20,7 +20,7 @@
     <parent>
         <artifactId>dhcpl2relay</artifactId>
         <groupId>org.opencord</groupId>
-        <version>2.2.0-SNAPSHOT</version>
+        <version>2.2.0</version>
     </parent>
     <modelVersion>4.0.0</modelVersion>