merged branch stloyd/missing_use_statement (PR #2886)

Commits
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8069ea6 [Form] Added missing use statements (closes #2880)

Discussion
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[Form] Missing use statements

Bug fix: yes
Feature addition: no
Backwards compatibility break: no
Symfony2 tests pass: yes
Fixes the following tickets: #2880

src/Symfony/Component/Form/Extension/Core/DataTransformer/ArrayToBooleanChoicesTransformer.php

@@ -13,6 +13,7 @@ namespace Symfony\Component\Form\Extension\Core\DataTransformer;
 
 use Symfony\Component\Form\Extension\Core\ChoiceList\ChoiceListInterface;
 use Symfony\Component\Form\DataTransformerInterface;
+use Symfony\Component\Form\Exception\TransformationFailedException;
 use Symfony\Component\Form\Exception\UnexpectedTypeException;
 
 class ArrayToBooleanChoicesTransformer implements DataTransformerInterface

src/Symfony/Component/Form/Extension/Core/DataTransformer/ScalarToBooleanChoicesTransformer.php

@@ -13,6 +13,7 @@ namespace Symfony\Component\Form\Extension\Core\DataTransformer;
 
 use Symfony\Component\Form\Extension\Core\ChoiceList\ChoiceListInterface;
 use Symfony\Component\Form\DataTransformerInterface;
+use Symfony\Component\Form\Exception\TransformationFailedException;
 use Symfony\Component\Form\Exception\UnexpectedTypeException;
 use Symfony\Component\Form\Util\FormUtil;