test/runtests.sh: make default timeout 30s, not 10s

The file register test takes more than 10 seconds, let's bump the
timeout.

We really need a way to signal if we expect to terminate a test
through a timeout, which would make the timeout expected, or
whether having to terminate it with timeout constitutes a failure.

Signed-off-by: Jens Axboe <axboe@kernel.dk>
1 file changed