Issue #2578805 by hussainweb: Upgrade to Symfony 2.7.5

composer.lock

vendor/composer/installed.json

vendor/symfony/console/Application.php

vendor/symfony/console/Helper/DialogHelper.php

vendor/symfony/console/Helper/ProcessHelper.php

vendor/symfony/console/Helper/ProgressBar.php

vendor/symfony/console/Helper/QuestionHelper.php

vendor/symfony/console/Helper/Table.php

vendor/symfony/console/Output/ConsoleOutput.php

vendor/symfony/console/Output/OutputInterface.php

vendor/symfony/console/Output/StreamOutput.php

vendor/symfony/console/Tests/ApplicationTest.php

vendor/symfony/console/Tests/ClockMock.php

vendor/symfony/console/Tests/Fixtures/application_asxml1.txt

vendor/symfony/console/Tests/Fixtures/application_asxml2.txt

...symfony/console/Tests/Helper/LegacyProgressHelperTest.php

vendor/symfony/console/Tests/Helper/ProgressBarTest.php

vendor/symfony/css-selector/Parser/Shortcut/ClassParser.php

...or/symfony/css-selector/Parser/Shortcut/ElementParser.php

vendor/symfony/css-selector/Parser/Shortcut/HashParser.php