Upgrade to Symfony 3.4

Integrated 0.8 ships with Symfony 3.4. Follow the upgrade guides from Symfony when upgrading your code from Symfony 2.8 to 3.4: https://github.com/symfony/symfony/blob/3.4/UPGRADE-3.0.md https://github.com/symfony/symfony/blob/3.4/UPGRADE-3.1.md https://github.com/symfony/symfony/blob/3.4/UPGRADE-3.2.md https://github.com/symfony/symfony/blob/3.4/UPGRADE-3.3.md https://github.com/symfony/symfony/blob/3.4/UPGRADE-3.4.md https://symfony.com/doc/3.4/setup/upgrade_major.html Other changes are: The Integrated bundles are combined in one repository. Load integrated/integrated as composer package The view directories within Integrated are now lowercase (following the Symfony best practices) For mongodb_options in parameters.yml you might need to replace "db" with "authSource" to specify the authentication database Uglyfyjs is not required any more, becuase of future Webpack migration