title: Celery beat schedule multiple tasks under same time-interval group
body: <p>I'm trying to set up two tasks that both run every minute. Is there any way to group them in one to run?</p>
  
  <p>I specified <code>CELERYBEAT_SCHEDULE</code> in my <code>celeryconfig.py</code> as following:</p>
  
  <pre><code>CELERYBEAT_SCHEDULE = {
      'every-minute': {
          'task': 'tasks.add',
          'schedule': crontab(minute='*/1'),
          'args': (1,2)
      },
  }
  </code></pre>
  
  <p>So if I want to run two tasks, I would expect something like this?</p>
  
  <pre><code>CELERYBEAT_SCHEDULE = {
      'every-minute': {
          'task': ['tasks.add','task.multiply'],
          'schedule': [crontab(minute='*/1'),crontab(minute='*/1')],
          'args': [(1,2),(3,4)]
      },
  }
  </code></pre>
  
  <p>However it did not work. Is there any standard way of doing this?</p>