Add Apache License content in .py files

Change-Id: Iebd5844dc2b999f19264daf61d4b73dc85f42111
diff --git a/releasenotes/source/conf.py b/releasenotes/source/conf.py
index eec42cd..97e3a4d 100644
--- a/releasenotes/source/conf.py
+++ b/releasenotes/source/conf.py
@@ -11,7 +11,7 @@
 # See the License for the specific language governing permissions and
 # limitations under the License.
 
-# tempest Release Notes documentation build configuration file, created by
+# Tempest Release Notes documentation build configuration file, created by
 # sphinx-quickstart on Tue Nov  3 17:40:50 2015.
 #
 # This file is execfile()d with the current directory set to its