spec: fix specs failing randomly

This is because creating a procedure attempts to create an admin from
scratch, and fails to do so.

Broken by 802f2086d6

spec/features/admin/connection_spec.rb

@@ -5,11 +5,10 @@ feature 'Administrator connection' do
 
   let(:email) { 'admin1@admin.com' }
   let(:password) { 'mon chien aime les bananes' }
-  let!(:admin) { create(:administrateur, email: email, password: password) }
+  let!(:admin) { create(:administrateur, :with_procedure, email: email, password: password) }
   let!(:gestionnaire) { create(:gestionnaire, :with_trusted_device, email: email, password: password) }
 
   before do
-    admin.procedures << create(:procedure)
     visit new_administrateur_session_path
   end
 

spec/features/admin/procedure_creation_spec.rb

@@ -4,10 +4,9 @@ require 'features/admin/procedure_spec_helper'
 feature 'As an administrateur I wanna create a new procedure', js: true do
   include ProcedureSpecHelper
 
-  let(:administrateur) { create(:administrateur) }
+  let(:administrateur) { create(:administrateur, :with_procedure) }
 
   before do
-    administrateur.procedures << create(:procedure)
     Flipflop::FeatureSet.current.test!.switch!(:publish_draft, true)
     login_as administrateur, scope: :administrateur
     visit root_path