Update Gerrit API version to 2.8 in pom.xml

Change-Id: I15738b7c3b2837d3e1d61a9cae533a4d6d2425ce

pom.xml

diff --git a/pom.xml b/pom.xml
index 3003906..73f1f39 100644
--- a/pom.xml
+++ b/pom.xml
@@ -23,7 +23,7 @@
   <artifactId>replication</artifactId>
   <name>replication</name>
   <packaging>jar</packaging>
-  <version>2.8-SNAPSHOT</version>
+  <version>2.8</version>
 
   <properties>
     <Gerrit-ApiType>plugin</Gerrit-ApiType>