* - moved testcontainers lifecycle control back to singleton
- changed kafka connect container wait strategy from logs to http
* refactoring
* reduced startup timeout to 5 minutes
* Rename attribute 'schemaName' to 'subject' for consistency with Schema Registry terms
* Refactor 'GET /schemas' and 'GET .../schemas/{subject}/versions' to get the latest schemas data at once
* Fix getting error code from attributes in our custom GlobalErrorWebExceptionHandler
* Map schema registry port to 8081 in kafka-clusters-only.yaml
* Add endpoint to retrieve subjects from schema registry by cluster name
* Add endpoint to retrieve subject versions from schema registry
* Get subject schema by version from schema-registry
* Add ability to create/delete schema subjects in/from schema-registry service
* Create WebClient bean and refactor its usage
* Refactor schema api contract
* Return 'Bad request' if there is 'Internal Server Error' from Schema Registry
* Add GET/PUT methods to get/update a schema compatibility level globally or only for a scepific schema
* Add SchemaRegistryContainer.java and testcontainers dependencies for integration tests
* Add junit-jupiter5 for testing
* Add GET/DELETE actions for the latest schema version
* Add endpoint to check schema compatibility
* Set up configuration for testing
* Add basic test for SchemaRegistryService
* Fix mapping from dto to web model
* Change createNewSchema action's endpoint
* Update tests in SchemaRegistryServiceTests
* Rename getLatestSchema method and update tests
* Add more test in SchemaRegistryServiceTests
* Include compatibility level info to schema response. Change Flux to Mono
* Update tests
* Pass schema-registry url for secondLocal cluster too
* Remove explicit returns of 404 status code (it'll be processed by global error handler)
* Add global error handler to response with exception details
* Autoconfigure WebTestClient in SchemaRegistryServiceTest
