Clear Sidekiq queues before examples

app/models/repository.rb

...migrations/backfill_version_author_and_created_at_spec.rb

ee/spec/migrations/migrate_epic_mentions_to_db_spec.rb

ee/spec/migrations/migrate_epic_notes_mentions_to_db_spec.rb

...chedule_merge_request_any_approval_rule_migration_spec.rb

...ions/schedule_project_any_approval_rule_migration_spec.rb

...rations/update_cs_vulnerability_confidence_column_spec.rb

ee/spec/services/ci/process_pipeline_service_spec.rb

ee/spec/services/projects/alerting/notify_service_spec.rb

...ervices/projects/prometheus/alerts/notify_service_spec.rb

ee/spec/tasks/gitlab/elastic_rake_spec.rb

spec/features/admin/admin_mode/workers_spec.rb

...b/background_migration/populate_untracked_uploads_spec.rb

...ab/background_migration/prepare_untracked_uploads_spec.rb

...ackground_migration/schedule_calculate_wiki_sizes_spec.rb

spec/lib/gitlab/background_migration_spec.rb

spec/lib/gitlab/database/migration_helpers_spec.rb

spec/lib/gitlab/hashed_storage/migrator_spec.rb

spec/lib/gitlab/sidekiq_versioning_spec.rb

...ations/20190924152703_migrate_issue_trackers_data_spec.rb