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.

Tried doing that, but `rsyslog` has no way of adding a config file.  Which is why i added the `only_if` condition below.  If the directory does not exist and the conf file is not added, logs will still be sent to the `syslog` facility.  Adding `include_recipe 'rs-base::rsyslog` seems too much at the time, but easy enough to just add.