Fix error "Errno::EPIPE: Broken pipe" on start.

The following error was occured on starting workers. Fix it.
"Errno::EPIPE: Broken pipe @ io_write - <STDERR>"

lib/capistrano-resque/tasks/capistrano-resque.rake

@@ -47,7 +47,7 @@ namespace :resque do
           number_of_workers.times do
             pid = "./tmp/pids/resque_work_#{worker_id}.pid"
             within current_path do
-              execute :rake, %{RAILS_ENV=#{fetch(:rails_env)} QUEUE="#{queue}" PIDFILE=#{pid} BACKGROUND=yes VERBOSE=1 INTERVAL=#{fetch(:interval)} #{"environment" if fetch(:resque_environment_task)} resque:work}
+              execute :rake, %{RAILS_ENV=#{fetch(:rails_env)} QUEUE="#{queue}" PIDFILE=#{pid} BACKGROUND=yes VERBOSE=1 INTERVAL=#{fetch(:interval)} #{"environment" if fetch(:resque_environment_task)} resque:work 2&>1}
             end
             worker_id += 1
           end