Merge pull request #541 from tangentlabs/fix/cleanup_json_serialisation

Renamed variable shadowing builtin

oscar/apps/customer/history_helpers.py

     u""" Simple function to convert lists to json """
     return json.loads(cookie_value)
 
-def _get_json_string_from_list(list):
+def _get_json_string_from_list(lst):
     """ Simple function to convert json to a python list """
-    return json.dumps(list)
+    return json.dumps(lst)
 
 
 # Receivers