VOL-2258 Update helm chart to use 2.2.2 images

Change-Id: I9b5f304b780d799f794fbf1a80948cd74bb11498
diff --git a/voltha-adapter-openolt/Chart.yaml b/voltha-adapter-openolt/Chart.yaml
index 8ab93ea..03072fe 100644
--- a/voltha-adapter-openolt/Chart.yaml
+++ b/voltha-adapter-openolt/Chart.yaml
@@ -17,5 +17,5 @@
 description: A Helm chart for Voltha OpenOLT Adapter
 icon: https://guide.opencord.org/logos/cord.svg
 
-version: 2.1.6
-appVersion: 2.2.1
+version: 2.1.7
+appVersion: 2.2.2