VOL-2189 Return to dev version

Change-Id: I4fa8524ada0893f337b4c4c22d56ea0738e34127
diff --git a/VERSION b/VERSION
index c043eea..97102b4 100644
--- a/VERSION
+++ b/VERSION
@@ -1 +1 @@
-2.2.1
+2.2.2-dev