bug #1608 Make CSRF extension work with Validator translations domain (hkdobrev)

This PR was squashed before being merged into the 2.3.x-dev branch (closes #1608).

Discussion
----------

Make CSRF extension work with Validator translations domain

- Make Validator translation domain configurable
- Fix #1569.

Commits
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935caf7b Make CSRF extension work with Validator translations domain

src/Silex/Provider/FormServiceProvider.php

@@ -47,7 +47,9 @@ class FormServiceProvider implements ServiceProviderInterface
 
         $app['form.extension.csrf'] = function ($app) {
             if (isset($app['translator'])) {
-                return new CsrfExtension($app['csrf.token_manager'], $app['translator']);
+                $translationDomain = isset($app['validator.translation_domain']) ? $app['validator.translation_domain'] : null;
+
+                return new CsrfExtension($app['csrf.token_manager'], $app['translator'], $translationDomain);
             }
 
             return new CsrfExtension($app['csrf.token_manager']);

src/Silex/Provider/ValidatorServiceProvider.php

@@ -35,7 +35,7 @@ class ValidatorServiceProvider implements ServiceProviderInterface
         $app['validator.builder'] = function ($app) {
             $builder = Validation::createValidatorBuilder();
             $builder->setConstraintValidatorFactory($app['validator.validator_factory']);
-            $builder->setTranslationDomain('validators');
+            $builder->setTranslationDomain($app['validator.translation_domain']);
             $builder->addObjectInitializers($app['validator.object_initializers']);
             $builder->setMetadataFactory($app['validator.mapping.class_metadata_factory']);
             if (isset($app['translator'])) {
@@ -58,5 +58,9 @@ class ValidatorServiceProvider implements ServiceProviderInterface
         };
 
         $app['validator.validator_service_ids'] = [];
+
+        $app['validator.translation_domain'] = function () {
+            return 'validators';
+        };
     }
 }