Mvn plugins for Gerrit v2.16 should use Java 8

Gerrit plugins that rely on a Maven build, should use Java 8
when targeting Gerrit v2.16.

Change-Id: I1427c5f576d08f69bf91bd9f8d89eae395fde295
diff --git a/jenkins/gerrit-mvn-build-plugin.sh b/jenkins/gerrit-mvn-build-plugin.sh
index fd9e54f..5669a1c 100644
--- a/jenkins/gerrit-mvn-build-plugin.sh
+++ b/jenkins/gerrit-mvn-build-plugin.sh
@@ -1,7 +1,7 @@
 #!/bin/bash -e
 
 
-if [ "{branch}" == "master" ] || [ "{branch}" == "stable-2.15" ] || [ "{branch}" == "stable-2.14" ]
+if [ "{branch}" == "master" ] || [ "{branch}" == "stable-2.16" ] || [ "{branch}" == "stable-2.15" ] || [ "{branch}" == "stable-2.14" ]
 then
   git read-tree -u --prefix=gerrit gerrit/{branch}
   . set-java.sh 8