Switch from smart_unicode/force_unicode to force_text.

Review Request #10206 — Created Oct. 8, 2018 and submitted — Latest diff uploaded

Information

Review Board
release-4.0.x
16c12b6...

Reviewers

Django's smart_unicode and force_unicode functions were deprecated
long ago in favor of smart_text and force_text. We use both in a few
places, though for smart_unicode we really wanted the force_
versions.

This change updates the code to call these modern methods instead,
getting us a small step toward modern Django compatibility.

Unit tests pass.