VOL-4203 - update voltha dependencies

Change-Id: I12cc59e56d79ca4509db26ec4ab1e0dbf0fb4075
diff --git a/.gitreview b/.gitreview
index dba8a92..89820e3 100644
--- a/.gitreview
+++ b/.gitreview
@@ -3,3 +3,4 @@
 port=29418
 project=voltctl.git
 defaultremote=origin
+defaultbranch=voltha-2.8