Release app version 2.8.0 with API version 2.8.0

Change-Id: I52155e200d61d8d9db15d77e2dd2872181cdf307
diff --git a/api/pom.xml b/api/pom.xml
index d9b6a49..e7d1e18 100644
--- a/api/pom.xml
+++ b/api/pom.xml
@@ -20,7 +20,7 @@
     <parent>
         <artifactId>onos-app-igmpproxy</artifactId>
         <groupId>org.opencord</groupId>
-        <version>2.8.0-SNAPSHOT</version>
+        <version>2.8.0</version>
         <relativePath>../pom.xml</relativePath>
     </parent>
     <modelVersion>4.0.0</modelVersion>