Add decorator and mixin for requiring consent decisions

Review Request #9948 — Created May 15, 2018 and submitted — Latest diff uploaded

Information

Djblets
release-1.0.x
eba94b3...

Reviewers

We now provide a view decorator (@check_pending_consent) and a view
mixin (CheckPendingConsentMixin) for requiring all consent decisions
to be made. If said decisions are not all made, the user will be
redirected to the URL specified in the
DJBLETS_PRIVACY_PENDING_CONSENT_REDIRECT_URL setting.

Ran unit tests.