**Apache Airflow version**:

1.10.12

**What happened**:

I created dag with dagrun_timeout=2 minutes. 

After 2 minutes dagrun is marked as failed and the next one is started, but task keeps going.

**What you expected to happen**:

Task is killed with dag run as it is done when you mark dagrun failed manually.

**How to reproduce it**:
```
dag = DAG(dag_id='platform.airflow-test',
          description='',
          schedule_interval="0 0 * * *",
          start_date=datetime(2020, 7, 1),
          max_active_runs=1,
          catchup=True,
          dagrun_timeout=timedelta(minutes=2))

run_this = BashOperator(
    task_id='run_after_loop',
    bash_command=' for((i=1;i<=600;i+=1)); do echo "Welcome $i times"; sleep 1;  done',
    dag=dag,
)
```
tests/jobs/test_scheduler_job.py
)
        ti1, ti2 = dr1.get_task_instances(session=session)
        dr1.state = State.RUNNING
        ti1.state = State.SCHEDULED
        ti1.queued_by_job_id = old_job.id
        session.merge(dr1)
        session.merge(ti1)
        ti2.state = State.SCHEDULED
        ti2.queued_by_job_id = scheduler_job.id
        session.merge(ti2)
        session.flush()
        num_reset_tis = scheduler_job.adopt_or_reset_orphaned_tasks(session=session)
        assert 1 == num_reset_tis
        session.refresh(ti1)
        assert ti1.state is None
        session.refresh(ti2)
        assert State.SCHEDULED == ti2.state
        session.rollback()
    def test_send_sla_callbacks_to_processor_sla_disabled(self):
        """Test SLA Callbacks are not sent when check_slas is False"""
        dag_id = 'test_send_sla_callbacks_to_processor_sla_disabled'
        dag = DAG(dag_id=dag_id, start_date=DEFAULT_DATE, schedule_interval='@daily')
        DummyOperator(task_id='task1', dag=dag)
        with patch.object(settings, "CHECK_SLAS", False):
            scheduler_job = SchedulerJob(subdir=os.devnull)
            mock_agent = mock.MagicMock()
            scheduler_job.processor_agent = mock_agent
            scheduler_job._send_sla_callbacks_to_processor(dag)
            scheduler_job.processor_agent.send_sla_callback_request_to_execute.assert_not_called()
    def test_send_sla_callbacks_to_processor_sla_no_task_slas(self):