Update released versions for olt, mcast, bng & dhcpl2relay

Change-Id: Idbe4eabf2344a1167a9f041ad1cd9c0a1a789619
diff --git a/VERSION b/VERSION
index 5d3985a..b6b8903 100644
--- a/VERSION
+++ b/VERSION
@@ -1 +1 @@
-2.12.4.4-dev
+2.12.4.5-dev