Add type info_key for list_unresponsive_queues

In the rabbitmqctl docs for list_unresponsive_queues, `type` is listed as
a queueinfoitem parameter, but this is not reflected in the source code.
This  commit adds `type` as a queueinfoitem parameter for list_unresponsive_queues.

Author: aaron-seo

deps/rabbitmq_cli/lib/rabbitmq/cli/ctl/commands/list_unresponsive_queues_command.ex

@@ -15,7 +15,7 @@ defmodule RabbitMQ.CLI.Ctl.Commands.ListUnresponsiveQueuesCommand do
 
   @info_keys ~w(name durable auto_delete
             arguments pid recoverable_slaves
-            recoverable_mirrors)a
+            recoverable_mirrors type)a
   @info_key_aliases [recoverable_mirrors: :recoverable_slaves]
 
   def info_keys(), do: @info_keys