Log to haproxy.log via syslog

- Update Gemfile to use latest berkshelf gem fixing bug to allow use of HTTPS enabled community site.
- Fixed bug in recipes/default where setting httpchk option overwrote the options array with a string.
- Creates a config file in rsyslog.d processing logs from haproxy.

Let's leave this out as `bundle update` will pull in the right version anyway. And we won't have to take this out when we move to Berkshelf 3.