[VOL-4021] Properly computing maxmium number of PON ports

Change-Id: I400f12f694eb8a8367b873218dd86c4a89eff739
diff --git a/VERSION b/VERSION
index 1545d96..c1aee2f 100644
--- a/VERSION
+++ b/VERSION
@@ -1 +1 @@
-3.5.0
+3.5.1-dev