SEBA-336 move BBSim to openOLT and openOMCI adaptors

Change-Id: If39f44e3f88c06a5725ecae069b1735d92c5ffd1
diff --git a/.gitreview b/.gitreview
index f459132..4ae00fe 100644
--- a/.gitreview
+++ b/.gitreview
@@ -3,3 +3,4 @@
 port=29418
 project=voltha.git
 defaultremote=origin
+defaultbranch=voltha-1.6