Updating openonu-go version in 2.8 release notes

Change-Id: Icd695ac6125b728bd2a44bbb0e3785d609f977f7
diff --git a/VERSION b/VERSION
index 92e6e77..85c0a6a 100644
--- a/VERSION
+++ b/VERSION
@@ -1 +1 @@
-2.8.15
+2.8.16