ansible1.9.noarch is not available on CentOS, so just install standard
ansible. It is >=2.x, but erp5-standalone.yml playbook works with it.

/reviewed-on nexedi/slapos.core!33

   Since the introduction of UserId every person document has reference set, so this condition never matches.

  The API require a valid user with login

  Only invoke the script on configurator tests, to prevent some properties (like memcache information),
  be overwriten by the initialisation.

  This test aims to test the constraints

Reimplement promise alarm as constraint.

  This part is handled automatically by the site creation.

slapos_configurator: Create a single script to define the inital list of BT5 between the configurator and the upgrader.

This allow us link Computers and Hosting Subscriptions to Projects using Tracking API

/reviewed-on nexedi/slapos.core!31

See also slapos@04e5d4aa.

Those scripts are part of the new API, added upfront to keep backward compatibility.

  The API uses code which is part of the new VIFIB 2.0 API, and
  uses simpler scripts and JSON for the exchange of information.

  This API may change again in futher future, but backward compatibility will be kept with the current implementaion

- Acquire subordination from parent Computer: Thanks to this Computer Partitions
can be in same category as Computers they are contained in.

- Computer should acquire region from parent.
- Add group acquisition on Computer Partition

Those changes overwrite the configuration from erp5_base, and to avoid fork erp5 code.