Use released ONOS 2.2.1 docker image

Change-Id: I7b678c2c422ae7fd9678917a4f2bf4ace26011b4
diff --git a/onos/Chart.yaml b/onos/Chart.yaml
index 6e1ab32..f1521c5 100644
--- a/onos/Chart.yaml
+++ b/onos/Chart.yaml
@@ -16,7 +16,6 @@
 apiVersion: v1
 name: onos
 description: Open Network Operating System
-version: 2.0.1-b2
+version: 2.0.1
 icon: https://guide.opencord.org/logos/onos.svg
-# FIXME: replace with 2.2.1 when released
-appVersion: 2.2.1-b5
+appVersion: 2.2.1