VOL-3362 Voltha protos cleanup

Change-Id: If0d23d1b726ce8d7e7a13f5027872e8efed69685
diff --git a/VERSION b/VERSION
index aedc15b..9cf22a4 100644
--- a/VERSION
+++ b/VERSION
@@ -1 +1 @@
-2.5.3
+2.5.4-dev