add Vendor model to select flavor/image at Tenant creation

Change-Id: I48343e55d24d5d298174f96886674cd75553fc41
diff --git a/xos/tosca/custom_types/vmme.yaml b/xos/tosca/custom_types/vmme.yaml
index 1f8aa77..20cf99f 100644
--- a/xos/tosca/custom_types/vmme.yaml
+++ b/xos/tosca/custom_types/vmme.yaml
@@ -92,3 +92,19 @@
                 type: string
                 required: false
                 description: Service specific ID opaque to XOS but meaningful to service
+
+    tosca.nodes.VMMEVendor:
+        derived_from: tosca.nodes.Root
+        description: >
+            VMME Vendor
+        capabilities:
+            xos_bas_service_caps
+        properties:
+            name:
+                type: string
+                required: true
+
+    tosca.relationships.VendorOfTenant:
+           derived_from: tosca.relationships.Root
+           valid_target_types: [ tosca.capabilities.xos.VMMETenant ]
+