Because we can now run multiple tests in travis concurrently now, we don not need this trick to speed up the test.
Because we can now run multiple tests in travis concurrently now, we don not need this trick to speed up the test.

A full test may provide more details.
jeffrey4l/django-qiniu-storage,jackeyGao/django-qiniu-storage,glasslion/django-qiniu-storage,Mark-Shine/django-qiniu-storage