Apply clean code policy

It's good idea to apply clean code policy to the code as more number of contributors are joining. It will be easy to maintain and change the framework artefacts.

Check/Consider
- Which are files can be considered for clean-code/testability
- Implement some logic in better way if possible(applicable)

Will try to expand this soon in the right prospective //TODO (wip_)

List of things could be considered:
+ Tidy up README - TOC on the top after the 1st paragraph would look nice
+ Core format jar for Eclipse n IntelliJ (already a ticket raised)
+ ZeroCodeJsonTestProcesorImpl#createJsonAsserters - Maintain in a separate new class
+ Copyright info with Apache2 license text
+ Delegate httpService, javaService and Kafka service into separate classes(responsibilities)
+ more (wip...)