CORD-1244 cleanup use of get_tenant/get_service

Change-Id: I89474025859ad0d0faf148b5c25706035908c71f
diff --git a/xos/tosca/resources/onosapp.py b/xos/tosca/resources/onosapp.py
index 0c7490a..39b3a2b 100644
--- a/xos/tosca/resources/onosapp.py
+++ b/xos/tosca/resources/onosapp.py
@@ -23,7 +23,7 @@
         return args
 
     def get_existing_objs(self):
-        objs = ONOSApp.get_tenant_objects().all()
+        objs = ONOSApp.objects.all()
         objs = [x for x in objs if x.name == self.obj_name]
         return objs