VOL-4223: Start a new minor version post voltha-2.8 release

Change-Id: I143ea709145e59f502c412b9f9af4612f0377025
diff --git a/VERSION b/VERSION
index 4db4b03..14377a8 100644
--- a/VERSION
+++ b/VERSION
@@ -1 +1 @@
-2.9.3
+2.10.0-dev