D-Net

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

Using snapshot parent

Ingored wrong test

fixed wrong import

modified OAI Collector plugin to skip invalid page but continue to download retrieving the next resumption token

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