Implement Event Handling

[DeeJayTC]

Generated API's should be able to send events to Azure Service Hub, Kafka, RabbitMQ or maybe even Kafka.

For that there needs to be a generic handler service that can wrap the underlying provider (ie Kafka etc).

• In all writing methods (delete, post, put) event handling must be added
• Allow connecting to Azure Service Bus & RMQ as a first version
• prepare for more brokers and direct http calls