Add legacy integration support
add options for statsd_forward_host and _port:

* this prevents clobbering of these options when
  using the beta agent in production
bump version for cooker
Add support for non_local_traffic
bump version for cooker
add custom emitters
bump version
initialize custom_emitters following dogstreams model
Overrides the dd-handler recipe to use custom gem

We need additional roles reported from our servers, so we need to customize the chef-handler-datadog gem and install it.
Updates the version setting for the chef handler datadog gem
Updates git settings to ensure its updated for each run
Updates to the execute command to hopefully make it work
Attempt to defer the chef_gem run untill the checkout and build are done