Refs: #4802@0.15h;

2017-11-03T13:49:37+00:00

  CR 2nd part

  - typos
  - unnecessary `class: Referential` removed from referentials_factory
  - regrouping of referential_suite related model specs

Refs:#4802@0.5h;

2017-11-03T13:44:56+00:00

      CodeReview:
      - Exchange fr and en translation files for referential_suites
      - Consistent usage of `jeu de donées` and `espace de travail` dans les *fr.yml

    Fixes: #4802@0.2h; Replaying former work. To identify spec regression

        Step 3: Added validation of reference_suite#new/current
                Made all specs pass

chouette-core/spec/models/referential_suite, branch robert-bup

Refs: #4802@0.15h;

Refs:#4802@0.5h;