VOL-4228: Bump minor version post voltha-2.8 release tagging

Change-Id: I32a0f60102f013ee2fa1fd39294c6eb0fb053223
diff --git a/VERSION b/VERSION
index 7921bd0..414a102 100644
--- a/VERSION
+++ b/VERSION
@@ -1 +1 @@
-3.4.8
+3.5.0-dev