This new Web Service can be configured to define a list of entry points associated to JSON Form.

Those entry points are accessed by a client by doing an HTTP Post with a JSON input body.
The input JSON is validated by the JSON Form.

An output JSON body is expected as response.

It allows to reuse the erp5js header gadget.

See nexedi/erp5!2039

Stop and delete b2b services

- Support Slave Instance allocated in the same tree
- allow creating allocation consistency ticket on Instance Node
- handle allocation consistency for Slave Instance without Instance Node

This is a fixup of d42de18b.

history and statistics files are sometimes corrupted because of invalid json

We do 2 things to improve this:
 1. we use json.load to read the previous file (this will detect if the file is corrupted)
 2. we use json.dump to write the entire file at once in a temporary file and then we move this file to be atomic.

Probably this will consume more resources.

See merge request nexedi/slapos.core!728

  This prevents installation update modification date due Web Page
  modification date is newer.

  This fixes the coding style tests broken by:

    slapos_web_deploy: Added missing standalone-test
    slapos_web_deploy: Add rplc_coupler deploy script

  It was create a while ago, but never pushed.

Do not acquire from Person to an Organisation, as most user do not have access to the organisation_module