Release voltha-go 2.1.2

Change-Id: I5c68f7398f82a614972caacc38ebf17219b2452c
diff --git a/VERSION b/VERSION
index 7f8d85c..eca07e4 100644
--- a/VERSION
+++ b/VERSION
@@ -1 +1 @@
-2.1.2-dev
+2.1.2