Updated service to use new XOS core version: 2.1.22

Change-Id: Ia261ac78a9dae10c265b8cc8415a18ee93a1f180
diff --git a/VERSION b/VERSION
index ccbccc3..c043eea 100644
--- a/VERSION
+++ b/VERSION
@@ -1 +1 @@
-2.2.0
+2.2.1