Make a tiny optimization to DailyTasksProcess.add_task()
Make a tiny optimization to DailyTasksProcess.add_task()

Only create default empty keyword args dict once for tasks that don't
have any keyword args. Previously, we were creating a new empty dict
every time such tasks were called, which is NBD really, but this is
"better".

wylee/django-arcutils,wylee/django-arcutils,PSU-OIT-ARC/django-arcutils,PSU-OIT-ARC/django-arcutils