Do not erase defaults when reading configuration from worker

Closes #144 (closed)

arkindex_worker/worker/base.py

@@ -215,13 +215,14 @@ class BaseWorker(object):
 
         # Load worker run configuration when available
         worker_configuration = worker_run.get("configuration")
-        if worker_configuration:
+        if worker_configuration and worker_configuration.get("configuration"):
             logger.info("Loaded user configuration from WorkerRun")
             self.user_configuration.update(worker_configuration.get("configuration"))
-            # if debug mode is set to true activate debug mode in logger
-            if self.user_configuration.get("debug"):
-                logger.setLevel(logging.DEBUG)
-                logger.debug("Debug output enabled")
+
+        # if debug mode is set to true activate debug mode in logger
+        if self.user_configuration.get("debug"):
+            logger.setLevel(logging.DEBUG)
+            logger.debug("Debug output enabled")
 
     def configure_cache(self):
         task_id = os.environ.get("PONOS_TASK")