Keep a lot more HAProxy logs

Space to burn, since we’re using additional ephemeral storage.
Clean up Berksfile
bundle update

Pin to latest Berkshelf v3.1.x, since  v3.2.0 has a depsolving issue
Fix some indentation in Serverspec tests
Fix up RuboCop inline en/disable rules
Fix copypasta in header for newrelic recipe
Switch to the newrelic_meetme_plugin cookbook
Bump to v3.4.0