Simplify getting name of email / sms providers

Previously we used a combination of "provider.name" and "get_name()"
which was confusing. Using a non-property function also gave me the
impression that the name was more dynamic than it actually is.

app/clients/email/__init__.py

@@ -28,5 +28,6 @@ class EmailClient(Client):
     def send_email(self, *args, **kwargs):
         raise NotImplementedError('TODO Need to implement.')
 
-    def get_name(self):
+    @property
+    def name(self):
         raise NotImplementedError('TODO Need to implement.')