[fix] remove json.load of dictionary

Dictionary was already loaded from a dictionary and should
not have been used as input to the json.loads function again.

Change-Id: I1d519d09e4e5e786fd30c23efa7de857a28fd67f

shipyard_airflow/plugins/armada_operator.py

@@ -346,8 +346,7 @@ class ArmadaOperator(BaseOperator):
         except json.JSONDecodeError as e:
             raise AirflowException(e)
 
-        status = str(json.loads(validate_site_design_dict).get('status',
-                                                               'unspecified'))
+        status = str(validate_site_design_dict.get('status', 'unspecified'))
         # Check if site design is valid
         logging.info("Armada Site Design valdation status "
                      "is: {}".format(status))