Release app version 2.6.0 with API version 2.6.0

Change-Id: I0ceec23686e0196d4534fc196e6a670723c8cd85
diff --git a/app/pom.xml b/app/pom.xml
index 7b3653e..4aa5797 100644
--- a/app/pom.xml
+++ b/app/pom.xml
@@ -20,7 +20,7 @@
     <parent>
         <artifactId>dhcpl2relay</artifactId>
         <groupId>org.opencord</groupId>
-        <version>2.6.0-SNAPSHOT</version>
+        <version>2.6.0</version>
     </parent>
     <modelVersion>4.0.0</modelVersion>