VOL-2189 Return to dev version

Change-Id: Iea51daf6a8a5d4f1920842b7796c0f3dcc2a3c79
diff --git a/VERSION b/VERSION
index c043eea..97102b4 100644
--- a/VERSION
+++ b/VERSION
@@ -1 +1 @@
-2.2.1
+2.2.2-dev