S3 media store configuration changed

The configuration of the media store S3Store , which maintains blobs in AWS S3, has changed. If you use a custom S3Store media store with an empty value for storeDir , no prefix for the blob path in the S3 bucket is applied now. The S3Store used to prepend an unnecessary / in this case. If you configure the S3Store by defining the property cap.server.blobstore.s3.bucketname , the default value for cap.server.blobstore.s3.rootdir is now an empty string and not blobstore/file as before.

Follow Section, “S3 media store configuration changed” for upgrade information.

(CMS-16139)