VOL-2630 return to -dev version

Change-Id: Ie32232a136749be4270221e8bbff9f2eec062708
diff --git a/VERSION b/VERSION
index 5859406..bdbe651 100644
--- a/VERSION
+++ b/VERSION
@@ -1 +1 @@
-2.2.3
+2.2.4-dev