Using updated 1.2.11 release of openonu adapter

Change-Id: Ia184e69cb57385f06824a5ec014ef7fc8a60c831
diff --git a/voltha-stack/Chart.yaml b/voltha-stack/Chart.yaml
index 74398ba..b06f432 100644
--- a/voltha-stack/Chart.yaml
+++ b/voltha-stack/Chart.yaml
@@ -28,7 +28,7 @@
 name: voltha-stack
 
 appVersion: "1.0"
-version: 0.1.17
+version: 0.1.18
 
 dependencies:
   - name: voltha
@@ -37,7 +37,7 @@
     condition: voltha.enabled
   - name: voltha-adapter-openonu
     repository: file://../voltha-adapter-openonu
-    version: 2.7.15
+    version: 2.7.16
     condition: voltha-adapter-openonu.enabled
   - name: voltha-adapter-openolt
     repository: file://../voltha-adapter-openolt