VOL-4236 redundant downstream me creation

Change-Id: Ib639aaf1cec54fdc16cc3be6fecd3d4d0feb0059
(cherry picked from commit c77d537605d3af2134a8be7554105d4d27203f5a)
diff --git a/.gitreview b/.gitreview
index 6e7dab7..0560466 100644
--- a/.gitreview
+++ b/.gitreview
@@ -3,3 +3,4 @@
 port=29418
 project=voltha-openonu-adapter-go.git
 defaultremote=origin
+defaultbranch=voltha-2.8