provisioner/salt-masterless: move states to /srv/salt, not /srv/salt/states

Latest version copies local state tree to {tmp}/states and then executes `mv {tmp}/states /srv/salt/`. This creates a `/srv/salt/states` instead of the correct `/srv/salt` directory.
Merge pull request #513 from rgarcia/salt-masterless-mv-bug

provisioner/salt-masterless: move states to /srv/salt, not /srv/salt/states