forgot to try/catch building workflow

src/jflow/workflows_manager.py

@@ -70,9 +70,8 @@ class WorkflowsManager(object):
             for class_name, obj in inspect.getmembers(sys.modules[modname], inspect.isclass):
                 if issubclass(obj, jflow.workflow.Workflow) and obj.__name__ != jflow.workflow.Workflow.__name__:
                     # try to build the workflow
-                    wf_instances.append(obj(parameters_section=parameters_section))
-                    #try: wf_instances.append(obj(parameters_section=parameters_section))
-                    #except: pass
+                    try: wf_instances.append(obj(parameters_section=parameters_section))
+                    except: pass
         return wf_instances
     
     def rerun_workflow(self, workflow_id):