Added celery utils which ensures our tasks are registered correctly. …

…Moved init_providers to here.

molly/conf/celery_util.py

@@ -0,0 +1,32 @@
+import djcelery
+
+from molly.conf.applications import all_apps
+from celery.signals import beat_init, worker_init
+
+
+def init_providers():
+    """Calls all the providers which in turns registers any Celery tasks
+    attached to that provider.
+    """
+    for app in all_apps():
+        for p in app.providers:
+            p()
+
+
+def celeryd_discover_tasks(sender=None, conf=None, **kwargs):
+    init_providers()
+
+
+def beat_update_schedule(sender=None, conf=None, **kwargs):
+    """Calling get_schedule will sync the schedule with any discovered tasks."""
+    celeryd_discover_tasks()
+    sender.get_scheduler().get_schedule()
+
+
+def prepare_celery():
+    """Runs the djcelery loader which is required to set the correct backend/scheduler
+    Then adds some signal callbacks to ensure all tasks are registered correctly.
+    """
+    djcelery.setup_loader()
+    beat_init.connect(beat_update_schedule)
+    worker_init.connect(celeryd_discover_tasks)