Only count public datasets on the source status

This is more in line with what is done on the orgs/groups pages

ckanext/harvest/logic/action/get.py

@@ -91,8 +91,8 @@ def harvest_source_show_status(context, data_dict):
             .join(harvest_model.HarvestObject) \
             .filter(harvest_model.HarvestObject.harvest_source_id==source.id) \
             .filter(harvest_model.HarvestObject.current==True) \
-            .filter(model.Package.state==u'active')
-
+            .filter(model.Package.state==u'active') \
+            .filter(model.Package.private==False)
     out['total_datasets'] = packages.count()
 
     return out