Releasing voltha-openonu-adapter-go for voltha-2.6 (alpha version)

Change-Id: I8f4334a8fd8dc4b922b461a0efc63793c91901a8
diff --git a/VERSION b/VERSION
index 7981294..c34958a 100644
--- a/VERSION
+++ b/VERSION
@@ -1 +1 @@
-0.1.15-dev149
+0.1.15