The Report model spec was directly adding methods
to the Report class, which was causing errors in the
admin reports controller because it would look for
a translation of the report name (e.g. report_timeout_test)
like so `I18n.t("reports.#{type}.title")`, then get an
error because the translation did not exist.
This is fixed by using `Report.stubs` instead, which is
cleaned up after every test.
0323b366f3