rake db:migrate:status fails in test app

[atz]

In .internal_test_app, bundle exec rake db:migrate:status gives:

Errno::ENOENT: No such file or directory @ dir_initialize - **/repos/browse-everything/.internal_test_app/db/migrate**

Interestingly, db:migrate runs fine, but we might want to generate an empty dir to support checking status via the common rake task. (Alternatively, we could suppress the task from being available.)