Define max preview of ZIP file - it fails if the file is about 6GB

[milanmajchrak]

PR: #630

Currently the ZIP preview is totally switched off by the cfg.

[milanmajchrak]

There is a max file count: https://github.com/dataquest-dev/DSpace/blob/dtq-dev/dspace-server-webapp/src/main/java/org/dspace/app/rest/repository/MetadataBitstreamRestRepository.java#L75

But the file size should be also considered.

[milanmajchrak]

About file size: