[COOK-3910] Use Upstart provider for Ubuntu 13.10

Ubuntu 13.10 deprecates managing OpenSSH with init script if upstart init method is used (default).

Ticket: https://tickets.opscode.com/browse/COOK-3910

There's no regression tests for this issue, but when Ubuntu 13.10 box and chef omnibus support will be released by Opscode, Ubuntu 13.10 can be added to ```.kitchen.yml``` and integration suite will fail without this PR.