Updating documentation with Radisys OLT and released version deployment, using latest openonu-go, moving to 2.9.0 Versions for infra e stack

Change-Id: I7b7836676fa478b8d7d168e91e151aee89c0a2dc
diff --git a/VERSION b/VERSION
index 834f262..dbe5900 100644
--- a/VERSION
+++ b/VERSION
@@ -1 +1 @@
-2.8.0
+2.8.1