add database cleaner

add factory girl
fix tests
rename dossier_pdf into piece_jointe
rename ref_piece_jointe into content

db/migrate/20150812091703_fix_ref_formulaire_to_dossier.rb

@@ -0,0 +1,6 @@
+class FixRefFormulaireToDossier < ActiveRecord::Migration
+  def change
+    remove_column :dossiers, :ref_formulaire, :integer
+    add_reference :dossiers, :ref_formulaire, index: true
+  end
+end

db/migrate/20150813095218_rename_ref_dossier_pdf_into_content.rb

@@ -0,0 +1,5 @@
+class RenameRefDossierPdfIntoContent < ActiveRecord::Migration
+  def change
+    rename_column :dossier_pdfs, :ref_dossier_pdf, :content
+  end
+end

db/migrate/20150813095939_rename_dossier_pdfintof_piece_jointe.rb

@@ -0,0 +1,5 @@
+class RenameDossierPdfintofPieceJointe < ActiveRecord::Migration
+  def change
+  	rename_table :dossier_pdfs, :pieces_jointes
+  end
+end