[#2557] Featured grps/orgs should include datasets

`include_datasets` now defaults to False (#2206), so need to include it
when getting the featured groups and orgs for the index page.

ckan/lib/helpers.py

@@ -1921,7 +1921,8 @@ def get_group(id):
         context = {'ignore_auth': True,
                    'limits': {'packages': 2},
                    'for_view': True}
-        data_dict = {'id': id}
+        data_dict = {'id': id,
+                     'include_datasets': True}
 
         try:
             out = logic.get_action(get_action)(context, data_dict)