Merge branch '2.7' into 2.8

* 2.7:
  [Form] refactor CheckboxListMapper and RadioListMapper
  Revert "[Form] refactor `RadioListMapper::mapDataToForm()`"

Author: fabpot

Tests/Form/Type/EntityTypeTest.php

@@ -287,7 +287,7 @@ public function testSubmitSingleExpandedNull()
         $field->submit(null);
 
         $this->assertNull($field->getData());
-        $this->assertNull($field->getViewData());
+        $this->assertSame('', $field->getViewData(), 'View data is always a string');
     }
 
     public function testSubmitSingleNonExpandedNull()

composer.json

@@ -23,7 +23,7 @@
     "require-dev": {
         "symfony/stopwatch": "~2.2|~3.0.0",
         "symfony/dependency-injection": "~2.2|~3.0.0",
-        "symfony/form": "~2.8|~3.0.0",
+        "symfony/form": "~2.8.5|~3.0.5",
         "symfony/http-kernel": "~2.2|~3.0.0",
         "symfony/property-access": "~2.3|~3.0.0",
         "symfony/property-info": "~2.8|3.0",