Use WorkerConfiguration instead of WorkerRun.configuration

Requires backend!1529

Closes #93 (closed)

arkindex_worker/worker/base.py

@@ -166,9 +166,14 @@ class BaseWorker(object):
             worker_run = self.request(
                 "RetrieveWorkerRun", id=os.environ["ARKINDEX_WORKER_RUN_ID"]
             )
-            self.user_configuration = worker_run.get("configuration")
-            if self.user_configuration:
-                logger.info("Loaded user configuration from WorkerRun")
+            configuration_id = worker_run.get("configuration_id")
+            if configuration_id:
+                worker_configuration = self.request(
+                    "RetrieveWorkerConfiguration", id=configuration_id
+                )
+                self.user_configuration = worker_configuration.get("configuration")
+                if self.user_configuration:
+                    logger.info("Loaded user configuration from WorkerRun")
 
         task_id = os.environ.get("PONOS_TASK")
         paths = None