Fix review request counters when reassigning ownership.
Review Request #8757 — Created Feb. 15, 2017 and submitted — Latest diff uploaded
Reassigning review request ownership worked pretty well overall, but would
leave the review request counters untouched. This change fixes that, and adds a
unit test to verify the results.
- Manually reassigned a review request and saw the pending/total counters
update correctly. - Ran unit tests.