Updates for Vagrant 1.3

From the [changelog](https://github.com/mitchellh/vagrant/blob/master/CHANGELOG.md#130-unreleased):

> config.ssh.max_tries is gone. Instead of maximum tries, Vagrant now uses a simple overall timeout value config.vm.boot_timeout to wait for the machine to boot up.

That means we need to fix https://github.com/fgrehm/vagrant-lxc/blob/master/lib/vagrant-lxc/action/boot.rb#L27

Besides that we need to support the new `ProvisionerCleanup` action from https://github.com/mitchellh/vagrant/commit/d4c7e2011018798b642c8bb401d61a401bfda46f