This makes exsiting of ordinary Wendelin and Wendelin with Data Lake impossible.
Rename accordingly.

See merge request !146

See merge request !145

See merge request !144

See merge request !142

See merge request !140

See merge request !141

See merge request !138

See merge request !137

See merge request !136

By default newly created data lake users will have their Assignments (i.e. access to the system) for 2 years.

See merge request !132

See merge request !129

See merge request !125

This reverts commit 45721d1e.

"application/octet-stream" whcih makes accessing object via ERP5-ish UI impossible.
The reason for this is that a call to _range_request_handler was always setting this "Content-Type" header.
This before switch to Zope4 remained unoticed. Fix now.

See merge request !124

See merge request !121

See merge request !120

This reverts commit 004be34a.