Release app version 2.6.0 with API version 2.6.0

Change-Id: I52946132ac892a005d70a0d85a21b930022baed2
diff --git a/api/pom.xml b/api/pom.xml
index f1726be..cba369b 100644
--- a/api/pom.xml
+++ b/api/pom.xml
@@ -20,7 +20,7 @@
     <parent>
         <artifactId>onos-app-igmpproxy</artifactId>
         <groupId>org.opencord</groupId>
-        <version>2.6.0-SNAPSHOT</version>
+        <version>2.6.0</version>
         <relativePath>../pom.xml</relativePath>
     </parent>
     <modelVersion>4.0.0</modelVersion>