[CORD-1969] VSGWC migration from 3.0 to 4.1

Change-Id: I7c33f351e494ed8a0ba18bf2a0fbf2447442cf95
diff --git a/xos/tosca/resources/vsgwctenant.py b/xos/tosca/resources/vsgwctenant.py
new file mode 100644
index 0000000..8f309e9
--- /dev/null
+++ b/xos/tosca/resources/vsgwctenant.py
@@ -0,0 +1,42 @@
+# Copyright 2017-present Open Networking Foundation
+#
+# Licensed under the Apache License, Version 2.0 (the "License");
+# you may not use this file except in compliance with the License.
+# You may obtain a copy of the License at
+#
+# http://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS,
+# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+# See the License for the specific language governing permissions and
+# limitations under the License.
+
+from xosresource import XOSResource
+from core.models import Service, ServiceInstance
+from services.vsgwc.models import VSGWCTenant
+
+class XOSVSGWCTenant(XOSResource):
+    provides = "tosca.nodes.VSGWCTenant"
+    xos_model = VSGWCTenant
+    name_field = "service_specific_id"
+    copyin_props = ()
+
+    def get_xos_args(self, throw_exception=True):
+        args = super(XOSVSGWCTenant, self).get_xos_args()
+
+        # ExampleTenant must always have a provider_service
+        provider_name = self.get_requirement("tosca.relationships.TenantOfService", throw_exception=throw_exception)
+        if provider_name:
+            args["provider_service"] = self.get_xos_object(Service, throw_exception=throw_exception, name=provider_name)
+
+        return args
+
+    def get_existing_objs(self):
+        args = self.get_xos_args(throw_exception=False)
+        return VSGWCTenant.get_tenant_objects().filter(provider_service=args["provider_service"], service_specific_id=args["service_specific_id"])
+        return []
+
+    def can_delete(self, obj):
+        return super(XOSVSGWCTenant, self).can_delete(obj)
+