Cutting number of feeds for fetching until mongo is sharded.

apps/rss_feeds/tasks.py

@@ -20,7 +20,7 @@ def run(self, **kwargs):
             next_scheduled_update__lte=now,
             active=True,
             active_premium_subscribers__gte=1
-        ).order_by('?')[:400]
+        ).order_by('?')[:200]
         popular_count = popular_feeds.count()
 
         # Regular feeds