title: Celery not picking CELERY_ALWAYS_EAGER settings
body: <p>I am running Django 1.8 + Celery 4.0.2
  Celery is configured well and can run my Django tasks locally on redis backend.
  But when I try to use <code>CELERY_ALWAYS_EAGER = True</code> settings,
  this settings has no effect. Which is not the case with other settings, e.g. <code>CELERY_TIMEZONE</code></p>
  
  <p>Specifically, in <code>pdb</code> I see that <code>app.conf.task_always_eager</code> is <code>False</code> </p>
  
  <blockquote>
    <p>lib/python2.7/site-packages/celery/app/task.py(520)apply_async()
    So somehow CELERY_ALWAYS_EAGER is not picked up and has no effect on app.conf.task_always_eager</p>
  </blockquote>
  
  <p>More info from pdb:</p>
  
  <pre><code>&gt; app.conf.get('CELERY_ALWAYS_EAGER')
  &gt; True
  &gt; app.conf.task_always_eager
  &gt; False
  </code></pre>
  
  <p>What can cause this? I know that Celery 4.x is in transition from old setting names to new ones, but they still promise old settings names still would be used as well.</p>