Freezing other repos for voltha-2.5

Change-Id: I368e1a42a79a958b900226658038d6ff2d59428a
diff --git a/VERSION b/VERSION
index 437459c..9080d9c 100644
--- a/VERSION
+++ b/VERSION
@@ -1 +1 @@
-2.5.0
+2.5.1-dev