fix sidekiq redis host

Gemfile.lock

config/initializers/sidekiq.rb

test/controllers/v1/collections_controller_test.rb

test/controllers/v1/complaints_controller_test.rb

test/controllers/v1/institutions_controller_test.rb

test/controllers/v1/languages_controller_test.rb

test/controllers/v1/learning_objects_controller_test.rb

test/controllers/v1/licenses_controller_test.rb

test/controllers/v1/mime_types_controller_test.rb

test/controllers/v1/object_types_controller_test.rb

test/controllers/v1/reviews_controller_test.rb

test/controllers/v1/scores_controller_test.rb

test/controllers/v1/users/bookmarks_controller_test.rb

test/controllers/v1/users_controller_test.rb