Rename TestingEnvironment to TestingEnvironmentVariables.

config/environment/test.php

misc/cron/updatetoken.php

tests/PHPUnit/Framework/Fixture.php

tests/PHPUnit/Framework/Mock/TestConfig.php

tests/PHPUnit/Framework/TestCase/IntegrationTestCase.php

...amework/TestingEnvironment/MakeGlobalSettingsWithFile.php

tests/PHPUnit/Framework/TestingEnvironmentVariables.php

tests/PHPUnit/System/EnvironmentValidationTest.php

tests/PHPUnit/System/ImportLogsTest.php

tests/PHPUnit/System/TrackerTest.php

tests/PHPUnit/proxy/archive.php

tests/PHPUnit/proxy/console

tests/PHPUnit/proxy/index.php

tests/PHPUnit/proxy/piwik.php