Release tag 2.1.2 for voltha-2.9

Change-Id: Ifa2a50eee055a480db140a80e12029e8ec4a539b
diff --git a/VERSION b/VERSION
index 43bc05d..eca07e4 100755
--- a/VERSION
+++ b/VERSION
@@ -1 +1 @@
-2.1.2-dev263
+2.1.2