Attempting fix for .travis.yml that runs celery and redis in the background.
Attempting fix for .travis.yml that runs celery and redis in the
background.

firebitsbr/memex-explorer,YongchaoShang/memex-explorer,memex-explorer/memex-explorer,memex-explorer/memex-explorer,YongchaoShang/memex-explorer,firebitsbr/memex-explorer,kod3r/memex-explorer,memex-explorer/memex-explorer,kod3r/memex-explorer,firebitsbr/memex-explorer,kod3r/memex-explorer,firebitsbr/memex-explorer,YongchaoShang/memex-explorer,kod3r/memex-explorer,YongchaoShang/memex-explorer,memex-explorer/memex-explorer