VOL-2630 return to -dev version

Change-Id: Ib54ad7d3194352c1f6ff954325ade4303d39d009
diff --git a/VERSION b/VERSION
index 530cdd9..7c8d436 100644
--- a/VERSION
+++ b/VERSION
@@ -1 +1 @@
-2.2.4
+2.2.5-dev