Updated all samples to use 'service' as the object returned from build()
diff --git a/samples/localdiscovery/buzz.py b/samples/localdiscovery/buzz.py
index 8b797f7..3fb0c6f 100644
--- a/samples/localdiscovery/buzz.py
+++ b/samples/localdiscovery/buzz.py
@@ -55,12 +55,12 @@
   f.close()
 
   # Construct a service from the local documents
-  p = build_from_document(discovery,
+  service = build_from_document(discovery,
       base="https://www.googleapis.com/",
       future=future,
       http=http,
       developerKey="AIzaSyDRRpR3GS1F1_jKNNM9HCNd2wJQyPG3oN0")
-  activities = p.activities()
+  activities = service.activities()
 
   try:
     # Retrieve the first two activities