Issue #2533360 by hussainweb: Upgrade to Symfony 2.7.2

core/composer.lock

core/vendor/composer/installed.json

core/vendor/symfony/browser-kit/Cookie.php

...ndor/symfony/class-loader/Tests/ClassMapGeneratorTest.php

.../class-loader/Tests/LegacyApcUniversalClassLoaderTest.php

...ony/class-loader/Tests/LegacyUniversalClassLoaderTest.php

core/vendor/symfony/console/Application.php

core/vendor/symfony/console/Descriptor/TextDescriptor.php

core/vendor/symfony/console/Formatter/OutputFormatter.php

...vendor/symfony/console/Formatter/OutputFormatterStyle.php

core/vendor/symfony/console/Helper/DebugFormatterHelper.php

core/vendor/symfony/console/Helper/DialogHelper.php

core/vendor/symfony/console/Helper/ProgressBar.php

core/vendor/symfony/console/Helper/Table.php

core/vendor/symfony/console/Input/ArgvInput.php

core/vendor/symfony/console/Output/ConsoleOutput.php

core/vendor/symfony/console/Question/ChoiceQuestion.php

core/vendor/symfony/console/Shell.php

core/vendor/symfony/console/Tests/ApplicationTest.php

core/vendor/symfony/console/Tests/Command/CommandTest.php