capistrano v3 restart resque workers

Capfile

require 'capistrano/setup'
require 'capistrano/deploy'
require 'capistrano/rvm'
require 'capistrano/rails'
require "capistrano-resque"
Dir.glob('lib/capistrano/tasks/*.cap').each { |r| import r }

deploy.rb

namespace :deploy do
	# working tasks
	after :published, "resque:restart"
end

Gemfile

source 'https://rubygems.org'

# Bundle edge Rails instead: gem 'rails', github: 'rails/rails'
gem 'rails', '4.1.0'

gem 'pg'
gem 'devise'
gem 'simple_form'
gem 'font-awesome-rails'
gem 'toastr-rails'
gem 'haml'
gem 'haml-rails'
gem 'draper', '~> 1.3'
gem 'paperclip', '~> 4.1'
gem 'bootstrap-datepicker-rails', '~> 1.3.0.2'
gem 'balanced'
gem 'geokit-rails'
gem 'rack-mini-profiler', require: false
gem 'remotipart', '~> 1.2'
gem 'resque'
gem 'resque_mailer'
gem 'rest-client'
gem 'will_paginate', '~> 3.0'
gem 'user_impersonate2', :require => 'user_impersonate'
gem 'logstasher'

group :development, :staging do
    gem 'railroady'
end

gem 'sass-rails', '~> 4.0.0'
gem 'uglifier', '>= 1.3.0'
gem 'coffee-rails', '~> 4.0.0'
gem 'jquery-rails'
gem 'turbolinks'
gem 'jbuilder', '~> 1.2'

group :doc do
  # bundle exec rake doc:rails generates the API under doc/api.
  gem 'sdoc', require: false
end

# Use Capistrano for deployment
gem 'capistrano', group: :development, git: 'https://github.com/capistrano/capistrano.git'
gem 'sshkit', git: 'https://github.com/capistrano/sshkit.git'
gem 'capistrano-rails'
# gem 'capistrano-bundler', '~> 1.1.2'
gem 'capistrano-rvm'
gem "capistrano-resque", "~> 0.2.1", require: false

# Use debugger
# gem 'debugger', group: [:development, :test]

staging.rb

set :stage, :staging
server '0.0.0.0', user: 'deploymentuser', roles: %w{web app db}, primary: true

# some environment-specific business for capistrano-resque
role :resque_worker, %w{deploymentuser@0.0.0.0}
# role :resque_scheduler, "web"
set :workers, { "mailer" => 1, "event" => 1 }
set :resque_environment_task, true