[VOL-4357] Using ONOS 2.5.4 as base image to fix the ONOS HA test

Change-Id: I160cb4d064f9e9a7d9afa5aaf3ff8fb0dd5ecf97
diff --git a/VERSION b/VERSION
index a1ef0ca..50e2274 100644
--- a/VERSION
+++ b/VERSION
@@ -1 +1 @@
-5.0.2
+5.0.3