Add latest changes from gitlab-org/gitlab@master

lib/gitlab/job_waiter.rb

lib/gitlab/slash_commands/presenters/base.rb

lib/gitlab/tracing.rb

locale/gitlab.pot

spec/controllers/explore/snippets_controller_spec.rb

spec/frontend/badges/components/badge_form_spec.js

spec/frontend/badges/components/badge_list_row_spec.js

spec/frontend/badges/components/badge_list_spec.js

spec/frontend/badges/components/badge_settings_spec.js

spec/frontend/badges/components/badge_spec.js

spec/frontend/badges/dummy_badge.js

spec/frontend/badges/store/actions_spec.js

spec/frontend/badges/store/mutations_spec.js

spec/frontend/notes/components/discussion_counter_spec.js

...d/notes/components/discussion_jump_to_next_button_spec.js

...nd/notes/components/discussion_keyboard_navigator_spec.js

spec/frontend/notes/mixins/discussion_navigation_spec.js

spec/javascripts/notes/components/discussion_counter_spec.js

spec/lib/gitlab/import_export/safe_model_attributes.yml

spec/lib/gitlab/job_waiter_spec.rb