[CORD-1969] VSGWC migration from 3.0 to 4.1

Change-Id: I7c33f351e494ed8a0ba18bf2a0fbf2447442cf95
diff --git a/xos/tosca/resources/vsgwcvendor.py b/xos/tosca/resources/vsgwcvendor.py
new file mode 100644
index 0000000..f0db57b
--- /dev/null
+++ b/xos/tosca/resources/vsgwcvendor.py
@@ -0,0 +1,46 @@
+# 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 ServiceInstance
+from services.vsgwc.models import VSGWCVendor
+
+class XOSVSGWCVendor(XOSResource):
+    provides = "tosca.nodes.VSGWCVendor"
+    xos_model = VSGWCVendor
+    name_field = None
+    copyin_props = ( "name",)
+
+    def get_xos_args(self, throw_exception=True):
+        args = super(XOSVSGWCVendor, self).get_xos_args()
+
+        tenant_name = self.get_requirement("tosca.relationships.VendorOfTenant", throw_exception=throw_exception)
+        if tenant_name:
+            args["provider_tenant"] = self.get_xos_object(ServiceInstance, throw_exception=throw_exception, name=tenant_name)
+
+        return args
+
+    def get_existing_objs(self):
+        args = self.get_xos_args(throw_exception=False)
+        provider_tenant = args.get("provider", None)
+        if provider_tenant:
+            return [ self.get_xos_object(provider_tenant=provider_tenant) ]
+        return []
+
+    def postprocess(self, obj):
+        pass
+
+    def can_delete(self, obj):
+        return super(XOSVSGWCVendor, self).can_delete(obj)
+