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

Change-Id: I7721a28de3b694a79493171f25f5497696b3b5c3
(cherry picked from commit 868131c6edc9eda73a31bf218ea63c3d93075592)
diff --git a/VERSION b/VERSION
index 3b31fa0..70c0eb4 100644
--- a/VERSION
+++ b/VERSION
@@ -1 +1 @@
-2.3.21
+2.3.22-dev