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/voltha-stack/Chart.yaml b/voltha-stack/Chart.yaml
index 0593c4b..0c83a64 100644
--- a/voltha-stack/Chart.yaml
+++ b/voltha-stack/Chart.yaml
@@ -28,7 +28,7 @@
 name: voltha-stack
 
 appVersion: "2.8"
-version: 0.2.9
+version: 2.8.0
 
 dependencies:
   - name: voltha
@@ -37,7 +37,7 @@
     condition: voltha.enabled
   - name: voltha-adapter-openonu
     repository: file://../voltha-adapter-openonu
-    version: 2.8.3
+    version: 2.8.5
     condition: voltha-adapter-openonu.enabled
   - name: voltha-adapter-openolt
     repository: file://../voltha-adapter-openolt