Bump VERSION back to dev

Change-Id: I90ae43f04d5ee82da4e0b7f1cc5848d0fe41ea13
diff --git a/VERSION b/VERSION
index c0f25ba..6f58ecf 100644
--- a/VERSION
+++ b/VERSION
@@ -1 +1 @@
-6.1.4
+6.1.5-dev0