Set `StreamsConfig.STATED_DIR_CONFIG` in `SuppressScenarioTest`, as
with `StreamsTestUtils`. I have deliberately avoided using `StreamsTestUtils` as
this test sets bogus config parameters, but still fails if the default
`STATE_DIR_CONFIG` does not exist.
Reviewers: Colin Patrick McCabe <colin@cmccabe.xyz>, John Roesler <john@confluent.io>, Ismael Juma <ismael@juma.me.uk>