refactor vSM cord-3.0

Change-Id: I3ce14febefccd0232ba24f491e0f0e37737e59b7
diff --git a/xos/tosca/resources/vsmtenant.py b/xos/tosca/resources/vsmtenant.py
index 56b2472..e932953 100644
--- a/xos/tosca/resources/vsmtenant.py
+++ b/xos/tosca/resources/vsmtenant.py
@@ -4,15 +4,15 @@
 class XOSVSMTenant(XOSResource):
     provides = "tosca.nodes.VSMTenant"
     xos_model = VSMTenant
-    copyin_props = ["tenant_message", "image_name"]  
+    copyin_props = ("tenant_message",) 
     name_field = None  
 
     def get_xos_args(self, throw_exception=True):
         args = super(XOSVSMTenant, self).get_xos_args()
 
-        provider_name = self.get_requirement("tosca.relationships.MemberOfService", throw_exception=throw_exception)
+        provider_name = self.get_requirement("tosca.relationships.TenantOfService", throw_exception=throw_exception)
         if provider_name:
-            args["provider_service"] = self.get_xos_object(VSMService, throw_exception=throw_exception, name=provider_name)
+            args["provider_service"] = self.get_xos_object(Service, throw_exception=throw_exception, name=provider_name)
 
         return args