Implement EZP-22163 : Implementing REST feature returning session informations (GET user/sessions/{id})

The goal here is to make a REST request returning session informations with the ID of the session.

The call can be done with GET user/sessions/{id} . This will return the same struct than POST user/sessions .

The specifications are include in the pull request and are from : https://github.com/ezsystems/ezpublish-kernel/pull/682 .

Some hand-made tests have been done but there are no unit tests.


JIRA link : https://jira.ez.no/browse/EZP-22163