tests/test_examples.py: Include copyright + license statement

Requested-by: Wouter Lueks <wouter.lueks@epfl.ch>

Author: jherland

tests/test_examples.py

@@ -1,3 +1,20 @@
+__copyright__ = """
+    Copyright 2020 EPFL
+
+    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.
+"""
+__license__ = "Apache 2.0"
+
 from pathlib import Path
 import pytest
 import subprocess