revert stage deepcopy removal

Author: guzzijones

orquesta/conducting.py

@@ -52,7 +52,7 @@ def serialize(self):
             "contexts": self.contexts,
             "routes": self.routes,
             "sequence": self.sequence,
-            "staged": self.staged,
+            "staged": json_util.deepcopy(self.staged),
             "status": self.status,
             "tasks": self.tasks,
         }

orquesta/tests/unit/base.py

@@ -217,7 +217,7 @@ def assert_task_list(self, conductor, actual, expected):
 
         for task in expected_copy:
             task["ctx"]["__current_task"] = {"id": task["id"], "route": task["route"]}
-            task["ctx"]["__state"] = copy.deepcopy(conductor.workflow_state.serialize())
+            task["ctx"]["__state"] = conductor.workflow_state.serialize()
 
             for staged_task in task["ctx"]["__state"]["staged"]:
                 if "items" in staged_task: