Explicitly specify the value of RedirectView.permanent.
Explicitly specify the value of RedirectView.permanent.

The default value of `RedirectView.permanent` changed from `True` to `False` in
Django 1.9, and it raises a warning when running against 1.7+. Explicitly
specify that we want permanent redirects.

Testing done:
Ran unit tests.

Reviewed at https://reviews.reviewboard.org/r/8689/

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