add discount input on customer form

core/lib/Thelia/Controller/Admin/CustomerController.php

@@ -90,6 +90,7 @@ class CustomerController extends AbstractCrudController
                 'lastname'  => $object->getLastname(),
                 'email'     => $object->getEmail(),
                 'title'     => $object->getTitleId(),
+                'discount'  => $object->getDiscount(),
         );
 
         if ($address !== null) {

core/lib/Thelia/Form/CustomerUpdateForm.php

@@ -158,6 +158,12 @@ class CustomerUpdateForm extends BaseForm
                     "for" => "title"
                 )
             ))
+            ->add('discount', 'text', array(
+                'label' => Translator::getInstance()->trans('permanent discount'),
+                'label_attr' => array(
+                    'for' => 'discount'
+                )
+            ))
         ;
     }
 

core/lib/Thelia/Model/Customer.php

@@ -143,6 +143,15 @@ class Customer extends BaseCustomer implements UserInterface
             ->findOne();
     }
 
+    public function setRef($v)
+    {
+        if (null !== $v) {
+            parent::setRef($v);
+        }
+
+        return $this;
+    }
+
     /**
      * create hash for plain password and set it in Customer object
      *