minor - pep8 and naming consistency

gluon/tests/test_tools.py

@@ -113,9 +113,8 @@ class TestMail(unittest.TestCase):
             self.username=username
             self.password=password
 
-        def sendmail(self,from_address,to_address,fullmessage):
+        def sendmail(self, sender, to, payload):
-            self.inbox.append(TestMail.Message(from_address,to_address,fullmessage))
+            self.inbox.append(TestMail.Message(sender, to, payload))
-            return []
 
         def quit(self):
             self.has_quit=True