6 files declare their use of ConstraintB in Plug 7

ClassMetadataTest.php in lib/Symfony/validator/Symfony/Component/Validator/Tests/Mapping/ClassMetadataTest.php

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

LegacyElementMetadataTest.php in lib/Symfony/validator/Symfony/Component/Validator/Tests/Mapping/LegacyElementMetadataTest.php

MemberMetadataTest.php in lib/Symfony/validator/Symfony/Component/Validator/Tests/Mapping/MemberMetadataTest.php

XmlFileLoaderTest.php in lib/Symfony/validator/Symfony/Component/Validator/Tests/Mapping/Loader/XmlFileLoaderTest.php

YamlFileLoaderTest.php in lib/Symfony/validator/Symfony/Component/Validator/Tests/Mapping/Loader/YamlFileLoaderTest.php