job: fix exception handling on job submission

- This is a workaround to prevent CWL workflow from getting stuck
on running state due to an infinite loop. This commit partially
fixes it. A workflow that fails on job submission validation will
end up with a finished status instead of failed. To be fixe as part
of #179

Author: mvidalgarcia

reana_workflow_engine_cwl/cwl_reana.py

@@ -359,7 +359,7 @@ def run(self, runtimeContext):  # noqa: C901
             log.error(
                 f"[job {self.name}] " f"Failed to submit task to job controller:\n{e}"
             )
-            return WorkflowException(e)
+            raise WorkflowException(e)
 
         def callback(rcode):
             try: