VOL-2371 Voltha 2.2.0 Helm Chart Release

Change-Id: I511797713a0b863be7c0feac2c9120891c12157e
diff --git a/VERSION b/VERSION
index 97ade15..ccbccc3 100644
--- a/VERSION
+++ b/VERSION
@@ -1 +1 @@
-2.2.0-dev
+2.2.0