Merge branch 'upgrade/gemfile' into 'master'

Gemfile

Gemfile.lock

engines/billing/test/broken/admin_customer_test.rb

engines/billing/test/broken/customer_creation_test.rb

engines/billing/test/broken/subscription_test.rb

engines/billing/test/factories.rb

engines/support/test/factories.rb

engines/support/test/functional/ticket_comments_test.rb

engines/support/test/functional/tickets_controller_test.rb

engines/support/test/functional/tickets_list_test.rb

engines/support/test/integration/create_ticket_test.rb

engines/support/test/unit/account_extension_test.rb

engines/support/test/unit/ticket_test.rb

features/step_definitions/auth_steps.rb

features/step_definitions/messages_steps.rb

test/factories.rb

test/functional/api/identities_controller_test.rb

test/functional/api/messages_controller_test.rb

test/functional/api/users_controller_test.rb

test/functional/identities_controller_test.rb