Fix dossier and invite dossier tests

spec/decorators/dossier_decorator_spec.rb

@@ -4,8 +4,8 @@ describe DossierDecorator do
   let(:dossier) { create(:dossier, created_at: Time.new(2015, 12, 24, 14, 10), updated_at: Time.new(2015, 12, 24, 14, 10)) }
   subject { dossier.decorate }
 
-  describe 'created_at' do
-    subject { super().created_at }
+  describe 'first_creation' do
+    subject { super().first_creation }
     it { is_expected.to eq('24/12/2015 14:10') }
   end
 

spec/facades/invite_dossier_facades_spec.rb

@@ -12,4 +12,5 @@ describe InviteDossierFacades do
   end
 
   it { expect(subject.dossier).to eq dossier }
+  it { expect(subject.commentaire_email).to eq email }
 end