Remove the frequency restriction on scheduler runs
Remove the frequency restriction on scheduler runs

Celery seems to have problems where it won't run tasks of different
types if there is still a backlog of tasks of one type, even if that
task type has restrictions on frequency.  This can become a problem
whenever there is a backlog assign_tasks tasks for whatever reason.

pyfarm/pyfarm-master,pyfarm/pyfarm-master,pyfarm/pyfarm-master