[VOL-4021] voltctl changes for ONU SW upgrade, new Download, Activate, Retrieve APIs

Change-Id: Icda7bac9dc4d2c1c73d91d9bfd0ef3144208681c
diff --git a/VERSION b/VERSION
index dc1e644..9c6d629 100644
--- a/VERSION
+++ b/VERSION
@@ -1 +1 @@
-1.6.0
+1.6.1