My last update to https://reviews.reviewboard.org/r/8776/ was done right

before some changes in the main RB repository caused an incompatibility:

https://reviews.reviewboard.org/r/9323/ 
This change addresses the breakage and a few more issues with unit tests:

to_submitter_only renamed to to_owner_only to match RB 3.0 API.
Avoid calling set(None) if get_user_team_ids fails, and instead copy

   the set before returning the cached result from get_user_team_ids.

   The exception was caught and ignored by the signal hook, so it did not show

   up in unit tests unless a failed test printed the logged error.
Check for exceptions in more unit tests to avoid hiding the above issue.
Add a new test for review request signal and error during team IDs request.
Fake urlopen calls need **kwargs after a recent kgb update, otherwise

   the fake call raises an exception due to unhandled default arguments.

All unit tests pass.

Manually verified that posting to I Done This works as expected.