Refactor leo_s3_auth for documentation
Refactor leo_s3_bucket for documentation
Refactor leo_s3_bucket_data_handler for documentation
Refactor leo_s3_endpoint for documentation
Refactor leo_s3_libs for documentation
Refactor leo_s3_libs_data_handler for documentation
Refactor leo_s3_user for documentation
Refactor leo_s3_user_credential for documentation
Fix dialyzer warnings