Attempt to fix phantom js issue on travis
Attempt to fix phantom js issue on travis

See: - https://github.com/travis-ci/travis-ci/issues/3225#issuecomment-110416315
     - https://github.com/ariya/phantomjs/issues/14574
     - https://github.com/teampoltergeist/poltergeist/issues/292

sensortower/sidekiq-throttled,sensortower/sidekiq-throttled,sensortower/sidekiq-throttled