[SEBA-494] Setting required core version

Change-Id: I3dbeece9b8b4b401ea6026bf28769809f537b046
diff --git a/xos/synchronizer/config.yaml b/xos/synchronizer/config.yaml
index 920aa5e..f6f1690 100644
--- a/xos/synchronizer/config.yaml
+++ b/xos/synchronizer/config.yaml
@@ -15,6 +15,7 @@
 
 
 name: att-workflow-driver
+core_version: ">=2.2.1"
 required_models:
   - AttWorkflowDriverService
   - AttWorkflowDriverServiceInstance