VOL-2258 release using voltha-lib-go 2.2.16

Change-Id: I484bc702ea7ea2d748ed29b62c6bcdd0b65156fa
diff --git a/VERSION b/VERSION
index 97102b4..b1b25a5 100644
--- a/VERSION
+++ b/VERSION
@@ -1 +1 @@
-2.2.2-dev
+2.2.2