Issue #3275530 by danflanagan8: Language Tests should not rely on Classy

.../language/tests/src/Functional/LanguageBreadcrumbTest.php

...age/tests/src/Functional/LanguageBrowserDetectionTest.php

...nguage/tests/src/Functional/LanguageConfigurationTest.php

...rc/Functional/LanguageCustomLanguageConfigurationTest.php

...odules/language/tests/src/Functional/LanguageListTest.php

.../language/tests/src/Functional/LanguageLocaleListTest.php

...s/language/tests/src/Functional/LanguageSwitchingTest.php

...ests/src/Functional/LanguageUILanguageNegotiationTest.php