VOL-2189 Return to dev version

Change-Id: If9828adc18d1f59d6e31f813a96cd2d9a7430b09
diff --git a/VERSION b/VERSION
index c043eea..97102b4 100644
--- a/VERSION
+++ b/VERSION
@@ -1 +1 @@
-2.2.1
+2.2.2-dev