D-Net

Updated to the latest version on dnet45 codebase: the stream is closed, need to copy the content

Expect date, not datetime for incremental harvesting

Fixed typo in logs

HttpSimpleCollectorPlugin now uses HttpConnector so that it can deal with redirect and retries

but we need an and

or is or

COnsider 201 code ok (for huma-num OAI-PMH endpoint)

ensureIndices on latest write (+ logs to double check)

SftpIterator can work incrementally with dates and datetimes

Reverted filesystem plugin to the first implementation that does not use FileDirectoryStream: files were left open causing Too many open files errors