add queue to travis sidekiq

.travis.yml

@@ -1,6 +1,6 @@
 language: ruby
 before_script:
-  - bundle exec sidekiq -r ./spec/dummy_app/app.rb -L /tmp/sidekiq.log &
+  - bundle exec sidekiq -r ./spec/dummy_app/app.rb -L /tmp/sidekiq.log -q default -q my_queue &
   - sleep 1
 script: rspec spec
 bundler_args: --without=extras