Dvrt mvp

…nstructor

…former

…Recovery

…store classHash in rocksDB

… class in AvroGenericDaVinciClient

…the return type of delete void. Proceed with deletion based off of storeRecordsInDaVinci

…iConfig to remove the need of instantiating a dummy record transformer, updated docs, and simplified function names

* Create MVP for record transformer

* Fix docs and imports

* Don't make serializers and deserializers global

* Dont check for boolean val

* Delete classHash if it exists

* Assert file deletion is true

* Improve code coverage

* Add tests for blocking record transformer

* Created AvroGenericDaVinciClient for record transformer test

* Make sure getRecordTransformer is valid

* Make sure getRecordTransformer isn't null

* Reorganize testRecordTransformerClient and fix key schema

* Fix TestStringRecordTransformer to work with Avro objects and update doc

* Refactor onRecovery and add javadoc for DaVinciRecordTransformer's constructor

* Reset offset if we need to bootstrap from VT

* Delete classHash after running tests

* Throw an error if a user tries to use blob transfer with record transformer

* Make previous public methods private, remove subscribe call inside onRecovery

* Correctly pass DVRT functional interface to initBackend, add todo to store classHash in rocksDB

* Fix spotbugs

* Init DVRT inside SIT, and move DVRT recovery to SIT

* Modify checkout action

* Undo

* Fix compilation

* Cache deserializer/serializer

* Create utility class for record transformer

* Create AbstractStorageIterator and a RocksDB implementation

* Delete classHash file. Compare value classes and don't override value class in AvroGenericDaVinciClient

* Remove compareCacheConfig mock

* Wrap access modifier with doPrivileged

* Fix spotless error

* Remove unused variables

* Added a ToDo to make chunking with record transformer lazy, and make the return type of delete void. Proceed with deletion based off of storeRecordsInDaVinci

* Created a config for record transformer that's passed into the DaVinciConfig to remove the need of instantiating a dummy record transformer, updated docs, and simplified function names

* Add message envelope for DVRT

* Fix spotless issue

* Fix test

* update docs