Bugfix for working with Kafka messages with Record keys

[omkar-shitole]

Fixes Issue

• Problem working with Kafka messages with Record keys in Zerocode version 1.3.28 and later #557

PR Branch
https://github.com/omkar-shitole/zerocode/tree/bugfix-kafka-messages-with-record-keys

Motivation and Context

Checklist:

• New Unit tests were added

  • Covered in existing Unit tests

• Integration tests were added

  • Covered in existing Integration tests

• Test names are meaningful

• Feature manually tested and outcome is successful

• PR doesn't break any of the earlier features for end users

  • WARNING! This might break one or more earlier earlier features, hence left a comment tagging all reviewrs

• Branch build passed in CI

• No 'package.*' in the imports

• Relevant Documentation page added or updated with clear instructions and examples for the end user

  • Not applicable. This was only a code refactor change, no functional or behaviourial changes were introduced

• Http test added to http-testing module(if applicable) ?

  • Not applicable. The changes did not affect HTTP automation flow

• Kafka test added to kafka-testing module(if applicable) ?

  • Not applicable. The changes did not affect Kafka automation flow