[es7][fix] pin python-elasticsearch-dsl version

2 jobs for debian/0.8.0-2 in 25 seconds (queued for 15 seconds)
latest
Status Name Job ID Coverage
  Test
passed flake8 #37487

00:00:25

failed py27 #37488

00:00:23

 
Name Stage Failure
failed
py27 Test
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