[COOK-2748] Handle /etc.init.d/fail2ban status for older versions

http://tickets.opscode.com/browse/COOK-2748

Fail2ban versions before 0.8.6-3 (for Debian) always return exit code 0 for the status command, even if the service is not running. This was fixed in newer versions which now return proper exit codes. It was fixed in fail2ban in https://github.com/fail2ban/fail2ban/pull/36.

It is probably a good idea to also check the other supported platform, but this pull request makes the status check work properly at least on all Ubuntu and Debian versions.