iotune: make sure help is working
iotune: make sure help is working

bpo::notify() will throw if we just call iotune with:

   iotune --help

This is because the evaluation directory is mandatory, and it won't be
present in the above command line. We end up with a confusing message,
telling us to try --help, which is what we have just did.

Move it earlier, so it works.

Signed-off-by: Glauber Costa <7ba9037b0dd006f9408bd45b94707becd5cd4e87@scylladb.com>
Message-Id: <1487092506-9223-1-git-send-email-7ba9037b0dd006f9408bd45b94707becd5cd4e87@scylladb.com>

cloudius-systems/seastar,dreamsxin/seastar,scylladb/seastar,scylladb/seastar,syuu1228/seastar,cloudius-systems/seastar,avikivity/seastar,cloudius-systems/seastar,avikivity/seastar,dreamsxin/seastar,dreamsxin/seastar,scylladb/seastar,avikivity/seastar,syuu1228/seastar,syuu1228/seastar