Support optional datadog events for haproxy check
Merge branch 'support-event-processing-for-haproxy' of https://github.com/evan2645/chef-datadog into evan2645-support-event-processing-for-haproxy
update haproxy template to accept key, value pairs

Flips the status_check flag to false, as that's the default, and should
be rarely used. `collect_status_metrics` is more useful than events
anyways.
Makes this more future-proof if new flags are added and are not
specified here.
Adds a kitchen test validating the rendered config file.
doc update for #103
remove extra run list items from kitchen tests

These are already invoked via include_recipe in the integration recipes,
not needed here.