Make sure firewall is permanently turned off and httpd is running after a reboot.

Without this patch, executing:

```
vagrant halt
vagrant up rundeck
```

will not start httpd automatically and rundeck itself is not accessible because
iptables blocks all ports except of ssh port 22.
Merge pull request #5 from mfriedenhagen/master

Make sure firewall is permanently turned off and httpd is running after a reboot.