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.

Does RightScale Chef still put backup files in the same directory instead of the current default behavior of normal Chef of putting them somewhere under `/var`? Does rsyslog's config not ignore files without `.conf` extensions? I don't think it is a good idea to get rid of backups like this unless we have a really good reason.