Pass original file name when sending contact list

Otherwise the new file doesn’t get a name, which is very confusing.

app/models/contact_list.py

@@ -76,17 +76,15 @@ class ContactList(JSONModel):
             bucket=ContactList.get_bucket_name(),
         )
 
-    @staticmethod
-    def copy_to_uploads(service_id, upload_id):
-        contents = ContactList.download(service_id, upload_id)
-        metadata = ContactList.get_metadata(service_id, upload_id)
+    def copy_to_uploads(self):
+        metadata = self.get_metadata(self.service_id, self.id)
         new_upload_id = s3upload(
-            service_id,
-            {'data': contents},
+            self.service_id,
+            {'data': self.contents},
             current_app.config['AWS_REGION'],
         )
         set_metadata_on_csv_upload(
-            service_id,
+            self.service_id,
             new_upload_id,
             **metadata,
         )