Ensure test database is migrated
Add for member participations

The method tested here wasn't covered by the suite, so of course it
broke with the upgrade to 4.1.1. The included test doesn't test the
functionality thoroughly enough, but it does at least run that section
of the code, and it was able to pick up the 4.1.1 failure.
Update seed data

The existing seed data is stale, and is very minimal. I updated this so
I could smoke test the 4.1.1 upgrade, so I figured I'd include it here
as well.