[VOL-2845]: Fix concurrent access of SouthBoundPort data in statsmanager module

Change-Id: I7721a28de3b694a79493171f25f5497696b3b5c3
(cherry picked from commit 868131c6edc9eda73a31bf218ea63c3d93075592)
diff --git a/.gitreview b/.gitreview
index a5311ab..13395d8 100644
--- a/.gitreview
+++ b/.gitreview
@@ -3,3 +3,4 @@
 port=29418
 project=voltha-openolt-adapter.git
 defaultremote=origin
+defaultbranch=voltha-2.3