Create a KStream: JDBC source connector with SMT -> Key:Long and Value:JSON

[ybyzek]

Create a KStream

Data source: JDBC source connector using SMTs that generate Key:Long and Value:JSON

Comparable existing example: https://github.com/confluentinc/examples/tree/5.3.0-post/connect-streams-pipeline#example-2-jdbc-source-connector-with-single-message-transformations---keylong-and-valuejson