Add support for onos-2.5 in Jenkins pipelines

Change-Id: Ie927ca5b5b0e0a1ac3403271187371dc24bfc31f
diff --git a/jjb/OnosSystemTest/onos-test-freestyle.yaml b/jjb/OnosSystemTest/onos-test-freestyle.yaml
index 3f55041..4cb35e4 100644
--- a/jjb/OnosSystemTest/onos-test-freestyle.yaml
+++ b/jjb/OnosSystemTest/onos-test-freestyle.yaml
@@ -18,6 +18,8 @@
       - '2.1'
       - '2.2'
       - '2.3'
+      - '2.4'
+      - '2.5'
       - 'master'
       - 'manually'