fix onos released version for the build jobs

Change-Id: I0d2051446fa6d4fafbd2c1760f33a609f75bf40f
diff --git a/Jenkinsfile-voltha-build b/Jenkinsfile-voltha-build
index 25a9a95..eb7082c 100644
--- a/Jenkinsfile-voltha-build
+++ b/Jenkinsfile-voltha-build
@@ -59,7 +59,7 @@
                     export KUBECONFIG=$WORKSPACE/${configBaseDir}/${configKubernetesDir}/${configFileName}.conf
                     cd kind-voltha/
                     if ( ${released} ); then
-                        export EXTRA_HELM_FLAGS="--set defaults.image_tag=null"
+                        export EXTRA_HELM_FLAGS="--set defaults.image_tag=null,images.onos.tag=2.2.0"
                     else
                         export EXTRA_HELM_FLAGS='-f $WORKSPACE/${configBaseDir}/${configKubernetesDir}/voltha/${configFileName}.yml'
                     fi