Added ezpublish-legacy-dir in composer.json
EZP-21019: Upgrade to Symfony 2.3
EZP-21019: Fixed setRequest() calls to fit new "synchronized services" feature

See http://symfony.com/blog/new-in-symfony-2-3-what-else#synchronized-services
EZP-21019: Removed useless $this->container->has( 'ezpublish.api.repository' ) check
EZP-21019: Fixed symfony-cmf/routing version
Merge pull request #445 from ezsystems/symfony2.3

Fix EZP-21019: Upgrade to Symfony 2.3