Remove test connection string from sample

Add support for custom message id. dotnetcore#668

Fix browser language detection. dotnetcore#631

upgrade Confluent.Kafka to 1.4.3

Fix rabbitmq connection may be reused when close forced. dotnetcore#533

Fix diagnostics event error. dotnetcore#504

Try to fix azure service bus header cast exception. dotnetcore#483

Add file copyright

change DashboardMiddleware to async (dotnetcore#390)

Add service name to RabbitMQ connection alias name