Tweak travis to finish faster and test rbx
Tweak travis to finish faster and test rbx

mhenrixon/sidekiq-unique-jobs,antek-drzewiecki/sidekiq-unique-jobs,mhenrixon/sidekiq-unique-jobs,mhenrixon/sidekiq-unique-jobs,yss44/sidekiq-unique-jobs,mhenrixon/sidekiq-unique-jobs