test: run tests against the SpyCarAdvanced catalog

Signed-off-by: Pierre-Alexandre Meyer <pierre@mouraf.org>
test: work around flakiness in tests by increasing delays

Signed-off-by: Pierre-Alexandre Meyer <pierre@mouraf.org>
test: remove unnecessary require line

Signed-off-by: Pierre-Alexandre Meyer <pierre@mouraf.org>
test: work around warning

KillbillTest is an abstract base class, it doesn't contain any test.

Signed-off-by: Pierre-Alexandre Meyer <pierre@mouraf.org>