VOL-2828 Bump post-2.3 release

Change-Id: Ia83b188961d1fa0c83f8326fefaa4e40ee594699
diff --git a/VERSION b/VERSION
index de2e889..45fbf50 100644
--- a/VERSION
+++ b/VERSION
@@ -1 +1 @@
-3.0.25
+3.1.0-dev0