handle case of node with null UJT

awx/main/scheduler/__init__.py

@@ -114,6 +114,8 @@ class TaskManager():
             dag = WorkflowDAG(workflow_job)
             spawn_nodes = dag.bfs_nodes_to_run()
             for spawn_node in spawn_nodes:
+                if spawn_node.unified_job_template is None:
+                    continue
                 kv = spawn_node.get_job_kwargs()
                 job = spawn_node.unified_job_template.create_unified_job(**kv)
                 spawn_node.job = job

awx/main/scheduler/dag_workflow.py

@@ -67,6 +67,8 @@ class WorkflowDAG(SimpleDAG):
             obj = n['node_object']
             job = obj.job
 
+            if obj.unified_job_template is None:
+                continue
             if not job:
                 return False
             # Job is about to run or is running. Hold our horses and wait for