When initializing counters for an older review request, we populate the

counter for the number of verified issues, but then we don't save it

along with the other counters. Unit tests didn't catch this, since the

comprehensive set of issue counter tests didn't check for verification

state changes.
This change fixes that logic and fleshes out the counter tests to make

sure that issue status changes are respected.

Unit tests pass.
The original issue encountered (during debugging of doc building) has

been fixed.