feature #24232 [Bridge\Doctrine] Add "DoctrineType::reset()" method (nicolas-grekas)

This PR was merged into the 3.4 branch.

Discussion
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[Bridge\Doctrine] Add "DoctrineType::reset()" method

| Q             | A
| ------------- | ---
| Branch?       | 3.4
| Bug fix?      | no
| New feature?  | yes
| BC breaks?    | no
| Deprecations? | no
| Tests pass?   | yes
| Fixed tickets | #23984
| License       | MIT
| Doc PR        | -

Works with https://github.com/doctrine/DoctrineBundle/pull/695

Commits
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dce1eb9 [Bridge\Doctrine] Add "DoctrineType::reset()" method

src/Symfony/Bridge/Doctrine/Form/Type/DoctrineType.php

@@ -280,4 +280,9 @@ abstract class DoctrineType extends AbstractType
     {
         return 'Symfony\Component\Form\Extension\Core\Type\ChoiceType';
     }
+
+    public function reset()
+    {
+        $this->choiceLoaders = array();
+    }
 }