Using openonu-adapter 1.0.0 in chart

Change-Id: I2fd654882867c9714207d10f228c8def388e3832
diff --git a/.gitreview b/.gitreview
index 2b11b97..b35a1d5 100644
--- a/.gitreview
+++ b/.gitreview
@@ -3,3 +3,4 @@
 port=29418
 project=voltha-helm-charts.git
 defaultremote=origin
+defaultbranch=voltha-2.6