Using released versions for VOLTHA-2.5

Change-Id: I6b2ebe96a45c4c16495ee8a9be011d194e9e47e7
diff --git a/VERSION b/VERSION
index 69fa968..437459c 100644
--- a/VERSION
+++ b/VERSION
@@ -1 +1 @@
-2.5.0-dev
+2.5.0