Fix property inconsistency between tosca and xproto

Change-Id: Ie5eff44f6726a727a721458b99a121fe31b4222d
diff --git a/xos/tosca/custom_types/vsm.yaml b/xos/tosca/custom_types/vsm.yaml
index 274f1cd..21f0f67 100644
--- a/xos/tosca/custom_types/vsm.yaml
+++ b/xos/tosca/custom_types/vsm.yaml
@@ -78,4 +78,23 @@
                 type: string
                 required: false
                 description: Version number of Service.
-
+            service_message:
+                type: string
+                required: true
+            
+    tosca.nodes.VSMTenant:
+        derived_from: tosca.nodes.Root
+        description: >
+            VSM Tenant
+        properties:
+            kind:
+                type: string
+                default: generic
+                description: Kind of tenant
+            service_specific_id:
+                type: string
+                required: false
+                description: Service specific ID opaque to XOS but meaningful to service
+            tenant_message:
+                type: string
+                required: true
\ No newline at end of file