Force Chef to use Systemd on platforms that support it

Otherwise, Chef manages the service by calling the init script directly. This
leaves Systemd out of sync and `service collector *` claiming the service has
crashed while `/etc/init.d/collector *` properly reports that it's running.

Also enables support in the service for the status and restart commands.

providers/default.rb

@@ -150,6 +150,10 @@ def sumo_service(action = :nothing)
     service_name 'collector' unless node['platform_family'] == 'windows'
     retries new_resource.service_retries
     retry_delay new_resource.service_retry_delay
+    supports status: true, restart: true
+    if Chef::Platform::ServiceHelpers.service_resource_providers.include?(:systemd)
+      provider Chef::Provider::Service::Systemd
+    end
     action action
   end
 end