refactor for v4.1

Change-Id: Ic2241a54348143640d2d6ee8683b53f2ec243aab
diff --git a/xos/tosca/resources/vmmetenant.py b/xos/tosca/resources/vmmetenant.py
index e1e9451..b1556c2 100644
--- a/xos/tosca/resources/vmmetenant.py
+++ b/xos/tosca/resources/vmmetenant.py
@@ -13,7 +13,7 @@
 # limitations under the License.
 
 from xosresource import XOSResource
-from core.models import Tenant, Service
+from core.models import ServiceInstance, Service
 from services.vmme.models import VMMETenant
 
 class XOSVMMETenant(XOSResource):