12 files declare their use of MetadataFactoryInterface in Plug 7

Abstract2Dot5ApiTest.php in lib/Symfony/validator/Symfony/Component/Validator/Tests/Validator/Abstract2Dot5ApiTest.php

AbstractLegacyApiTest.php in lib/Symfony/validator/Symfony/Component/Validator/Tests/Validator/AbstractLegacyApiTest.php

FakeMetadataFactory.php in lib/Symfony/validator/Symfony/Component/Validator/Tests/Fixtures/FakeMetadataFactory.php

LegacyExecutionContext.php in lib/Symfony/validator/Symfony/Component/Validator/Context/LegacyExecutionContext.php

LegacyExecutionContextFactory.php in lib/Symfony/validator/Symfony/Component/Validator/Context/LegacyExecutionContextFactory.php

LegacyValidator2Dot5ApiTest.php in lib/Symfony/validator/Symfony/Component/Validator/Tests/Validator/LegacyValidator2Dot5ApiTest.php

LegacyValidatorLegacyApiTest.php in lib/Symfony/validator/Symfony/Component/Validator/Tests/Validator/LegacyValidatorLegacyApiTest.php

MetadataFactoryInterface.php in lib/Symfony/validator/Symfony/Component/Validator/Mapping/Factory/MetadataFactoryInterface.php

RecursiveContextualValidator.php in lib/Symfony/validator/Symfony/Component/Validator/Validator/RecursiveContextualValidator.php

RecursiveValidator.php in lib/Symfony/validator/Symfony/Component/Validator/Validator/RecursiveValidator.php

RecursiveValidator2Dot5ApiTest.php in lib/Symfony/validator/Symfony/Component/Validator/Tests/Validator/RecursiveValidator2Dot5ApiTest.php

ValidatorTest.php in lib/Symfony/validator/Symfony/Component/Validator/Tests/ValidatorTest.php