Features
* Display file diff on black-check
* Support for environment variables in the HPO
* Support role as PipelineParameter in Processor class
* Add TrainingImageConfig support for SageMaker training jobs
Bug Fixes and Other Changes
* use FeatureGroup's Session in nonconcurrency ingestion
* Update feature_group.py ingest() description
* Do not use print function. User logger instead
* Add batch_get_record and search API for FeatureStore
* hashing problem for framework processors with identical source dirs