Test KafkaSink behavior on Kafka broker outage

[metacret]

Needs to test and implement remedy for the issue

The first scenario

• Shutdown kafka broker
• Start the producer and produce messages, messages should be dropped immediately
• Start kafka broker
• Produce messages, messages should be sent without any error

The second scenario

• Running kafka, start the producer, produce messages
• Shutdown kafka broker, produce messages, messages should be dropped immediately
• Start kafka broker
• Produce messages, messages should be sent without any error

[metacret]

#171