S3 bucket behaviour is confusing / inconsistent

[TonyNoble]

In MinioDataStore.java, fetching a file stored in S3/Minio (getMinioFile) has the following logic:

• If the filename has no path elements, the default bucket name is prepended.
• If the filename has one or more path elements, the bucket prefix is prepended

This does not account for instances where a file might have multiple path elements, but does not include the bucket name, leading to inconsistent behaviour - suggest that the bucket name and file path should be separate parameters in the method call. Then detecting which scenario would apply would be much simpler.