Add copyright to setup.py

Author: remingtonc

setup.py

@@ -1,3 +1,27 @@
+#!/usr/bin/env python
+"""Copyright 2020 Cisco Systems
+All rights reserved.
+
+Redistribution and use in source and binary forms, with or without
+modification, are permitted provided that the following conditions are
+met:
+
+ * Redistributions of source code must retain the above copyright
+ notice, this list of conditions and the following disclaimer.
+
+The contents of this file are 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.
+"""
+
 """Derived from Flask
 https://github.com/pallets/flask/blob/master/setup.py
 """