Using updated openolt chart for 2.4

Change-Id: Ib3637452af49bd9b7f8ad198b5badda52cec0b7a
diff --git a/VERSION b/VERSION
index f8ee15f..831446c 100644
--- a/VERSION
+++ b/VERSION
@@ -1 +1 @@
-5.1.0-dev
+5.1.0