Split the reviewboard.search unit tests into multiple files.
Review Request #11346 — Created Dec. 23, 2020 and submitted
reviewboard.search.testswas getting a bit hard to manage, and new
tests for new classes will soon be written. To prepare for this, this
change splits the test suite into 3 new files.
The test code is largely unchanged, with a few exceptions:
- Missing/broken docstrings were added/corrected.
- Some Django 1.6-specific code has been removed.
- A KGB call has been updated for modern best practices.
Unit tests pass on Python 2.7 and 3.6 through 3.9.
Ensured I didn't have a stale
W391 blank line at end of file