use system call to start sidekiq

lib/tasks/sidekiq.rake

 namespace :sidekiq do
   desc "GITLAB | Stop sidekiq"
   task :stop do
-    run "bundle exec sidekiqctl stop #{pidfile}"
+    system "bundle exec sidekiqctl stop #{pidfile}"
   end
 
   desc "GITLAB | Start sidekiq"
   task :start do
-    run "nohup bundle exec sidekiq -q post_receive,mailer,system_hook,project_web_hook,gitlab_shell,common,default -e #{Rails.env} -P #{pidfile} >> #{Rails.root.join("log", "sidekiq.log")} 2>&1 &"
+    system "nohup bundle exec sidekiq -q post_receive,mailer,system_hook,project_web_hook,gitlab_shell,common,default -e #{Rails.env} -P #{pidfile} >> #{Rails.root.join("log", "sidekiq.log")} 2>&1 &"
   end
-  
+
   desc "GITLAB | Start sidekiq with launchd on Mac OS X"
   task :launchd do
-    run "bundle exec sidekiq -q post_receive,mailer,system_hook,project_web_hook,gitlab_shell,common,default -e #{Rails.env} -P #{pidfile} >> #{Rails.root.join("log", "sidekiq.log")} 2>&1"
+    system "bundle exec sidekiq -q post_receive,mailer,system_hook,project_web_hook,gitlab_shell,common,default -e #{Rails.env} -P #{pidfile} >> #{Rails.root.join("log", "sidekiq.log")} 2>&1"
   end
-  
+
   def pidfile
     Rails.root.join("tmp", "pids", "sidekiq.pid")
   end