CORD-1244 cleanup use of get_tenant/get_service

Change-Id: Ib7e0efc2c084d891c831451db4bdae3dbd3c9814
diff --git a/xos/api/service/vsg/vsgservice.py b/xos/api/service/vsg/vsgservice.py
index a04fb3e..5fe04f2 100644
--- a/xos/api/service/vsg/vsgservice.py
+++ b/xos/api/service/vsg/vsgservice.py
@@ -60,7 +60,7 @@
     base_name = "vsgservice"
     method_name = None # use the api endpoint /api/service/vsg/
     method_kind = "viewset"
-    queryset = VSGService.get_service_objects().select_related().all()
+    queryset = VSGService.objects.select_related().all()
     serializer_class = VSGServiceSerializer
 
     @classmethod
diff --git a/xos/api/tenant/cord/vsg.py b/xos/api/tenant/cord/vsg.py
index c6a4247..2058942 100644
--- a/xos/api/tenant/cord/vsg.py
+++ b/xos/api/tenant/cord/vsg.py
@@ -11,7 +11,7 @@
 from api.xosapi_helpers import PlusModelSerializer, XOSViewSet, ReadOnlyField
 
 def get_default_vsg_service():
-    vsg_services = VSGService.get_service_objects().all()
+    vsg_services = VSGService.objects.all()
     if vsg_services:
         return vsg_services[0].id
     return None
@@ -46,7 +46,7 @@
     base_name = "vsg"
     method_name = "vsg"
     method_kind = "viewset"
-    queryset = VSGTenantForAPI.get_tenant_objects().all()
+    queryset = VSGTenantForAPI.objects.all()
     serializer_class = VSGTenantSerializer
 
     @classmethod