Copy response value rather than future object

Author: jlandersen

kafka/admin/client.py

@@ -547,7 +547,7 @@ def describe_configs(self, config_resources, include_synonyms=False):
         self._wait_for_futures(futures)
 
         # Use one of the results as the general response and add all other resources to it
-        response = copy.copy(futures[0])
+        response = copy.copy(futures[0].value)
         response.resources = []
 
         for future in futures: