specs: always require rails_helper

Test helpers are separated between two files: spec_helper and
rails_helper. This separation is meant to allow tests that do not
require Rails (like testing standalone libs) to boot faster.

The spec_helper file is always loaded, through `--require spec_helper`
in the `.rspec` config file. When needed, the rails_helper file is
expected to be required manually.

This is fine, but:
- Many test files have a redundant `require 'spec_helper'` line;
- Many test files should require `rails_helper`, but don't.

Not requiring `rails_helper` will cause the Rails-concerned section of
the test environment not to be configured–which may cause subtle bugs
(like the test database not being properly initialized).

Moreover, Spring loads all the Rails files on preloading anyway. So the
gains from using only `spec_helper` are thin.

To streamline this process, this commit:
- Configures `.rspec` to require `rails_helper` by default;
- Remove all manual requires to spec_helper or rails_helper.

Reference: https://stackoverflow.com/questions/24145329/how-is-spec-rails-helper-rb-different-from-spec-spec-helper-rb-do-i-need-it

spec/features/admin/admin_creation_spec.rb

@@ -1,5 +1,3 @@
-require 'spec_helper'
-
 feature 'As an administrateur', js: true do
   let(:administration) { create(:administration) }
   let(:admin_email) { 'new_admin@gouv.fr' }

spec/features/admin/procedure_cloning_spec.rb

@@ -1,4 +1,3 @@
-require 'spec_helper'
 require 'features/admin/procedure_spec_helper'
 
 feature 'As an administrateur I wanna clone a procedure', js: true do

spec/features/admin/procedure_creation_spec.rb

@@ -1,4 +1,3 @@
-require 'spec_helper'
 require 'features/admin/procedure_spec_helper'
 
 feature 'As an administrateur I wanna create a new procedure', js: true do

spec/features/admin/procedure_locked_spec.rb

@@ -1,5 +1,3 @@
-require 'spec_helper'
-
 feature 'procedure locked' do
   let(:administrateur) { create(:administrateur) }
 

spec/features/admin/procedure_update_spec.rb

@@ -1,4 +1,3 @@
-require 'spec_helper'
 require 'features/admin/procedure_spec_helper'
 
 feature 'Administrateurs can edit procedures', js: true do

spec/features/france_connect/france_connect_particulier_spec.rb

@@ -1,5 +1,3 @@
-require 'spec_helper'
-
 feature 'France Connect Particulier Connexion' do
   let(:code) { 'plop' }
   let(:given_name) { 'titi' }

spec/features/help_spec.rb

@@ -1,5 +1,3 @@
-require 'spec_helper'
-
 feature 'Getting help:' do
   scenario 'a Help button is visible on public pages' do
     visit '/'

spec/features/instructeurs/expert_spec.rb

@@ -1,5 +1,3 @@
-require 'spec_helper'
-
 feature 'Inviting an expert:' do
   include ActiveJob::TestHelper
   include ActionView::Helpers

spec/features/instructeurs/instructeur_creation_spec.rb

@@ -1,5 +1,3 @@
-require 'spec_helper'
-
 feature 'As an instructeur', js: true do
   let(:administrateur) { create(:administrateur, :with_procedure) }
   let(:procedure) { administrateur.procedures.first }

spec/features/instructeurs/instruction_spec.rb

@@ -1,5 +1,3 @@
-require 'spec_helper'
-
 feature 'Instructing a dossier:' do
   include ActiveJob::TestHelper
 

spec/features/instructeurs/procedure_filters_spec.rb

@@ -1,5 +1,3 @@
-require "spec_helper"
-
 feature "procedure filters" do
   let(:instructeur) { create(:instructeur) }
   let(:procedure) { create(:procedure, :published, :with_type_de_champ, instructeurs: [instructeur]) }

spec/features/new_administrateur/types_de_champ_spec.rb

@@ -1,5 +1,3 @@
-require 'spec_helper'
-
 feature 'As an administrateur I can edit types de champ', js: true do
   let(:administrateur) { procedure.administrateurs.first }
   let(:procedure) { create(:procedure) }

spec/features/outdated_browser_spec.rb

@@ -1,5 +1,3 @@
-require 'spec_helper'
-
 feature 'Outdated browsers support:' do
   context 'when the user browser is outdated' do
     before(:each) do

spec/features/routing/full_scenario_spec.rb

@@ -1,5 +1,3 @@
-require 'spec_helper'
-
 feature 'The routing', js: true do
   let(:password) { 'a very complicated password' }
   let(:procedure) { create(:procedure, :with_type_de_champ, :with_service, :for_individual) }

spec/features/sessions/sign_in_spec.rb

@@ -1,5 +1,3 @@
-require 'spec_helper'
-
 feature 'Signin in:' do
   let!(:user) { create(:user, password: password) }
   let(:password) { 'démarches-simplifiées-pwd' }

spec/features/users/brouillon_spec.rb

@@ -1,5 +1,3 @@
-require 'rails_helper'
-
 feature 'The user' do
   let(:password) { 'démarches-simplifiées-pwd' }
   let!(:user) { create(:user, password: password) }

spec/features/users/change_email_spec.rb

@@ -1,5 +1,3 @@
-require 'spec_helper'
-
 feature 'Changing an email' do
   let(:old_email) { 'old@email.com' }
   let(:user) { create(:user, email: old_email) }

spec/features/users/dossier_creation_spec.rb

@@ -1,5 +1,3 @@
-require 'spec_helper'
-
 feature 'Creating a new dossier:' do
   let(:user)  { create(:user) }
   let(:siret) { '40307130100044' }

spec/features/users/invite_spec.rb

@@ -1,4 +1,3 @@
-require 'spec_helper'
 require 'features/users/dossier_shared_examples.rb'
 
 feature 'Invitations' do

spec/features/users/linked_dropdown_spec.rb

@@ -1,5 +1,3 @@
-require 'spec_helper'
-
 feature 'linked dropdown lists' do
   let(:password) { 'démarches-simplifiées-pwd' }
   let!(:user) { create(:user, password: password) }

spec/features/users/list_dossiers_spec.rb

@@ -1,5 +1,3 @@
-require 'spec_helper'
-
 describe 'user access to the list of their dossiers' do
   let(:user) { create(:user) }
   let!(:dossier_brouillon)       { create(:dossier, user: user) }

spec/features/users/managing_password_spec.rb

@@ -1,5 +1,3 @@
-require 'spec_helper'
-
 feature 'Managing password:' do
   context 'for simple users' do
     let(:user) { create(:user) }

spec/features/users/sign_out_spec.rb

@@ -1,5 +1,3 @@
-require 'spec_helper'
-
 feature 'Sign out' do
   context 'when a user is logged in' do
     let(:user) { create(:administrateur).user }

spec/features/users/sign_up_spec.rb

@@ -1,5 +1,3 @@
-require 'spec_helper'
-
 feature 'Signing up:' do
   let(:user_email) { generate :user_email }
   let(:user_password) { 'démarches-simplifiées-pwd' }