We want to show a log of notifications that have been sent from the API.
The admin app uses its own private `/service/…/notifications` endpoint
for listing activity. This commit allows us to pass through two
optional, additional parameters to tell the API to:
- include or not include notifications created from a job
- include or not include notifications created with a test API key
Starting arguments on their own line and putting the closing parenthesis
on it’s own line because any subsequent changes to the arguments diff
cleanly (ie without touching any other lines).
The clients never get passed useful values to their `__init__` methods.
Rather the real values are passed through later using the `init_app`
method.
So it should be an error if the client is relying on the values that
get passed to it’s init method. Easiest way to ensure this is by making
the `__init__` method not expect any arguments and passing fake values
to the `Super` call.
