added symfony versions to build project

.travis.yml

@@ -5,12 +5,21 @@ php:
     - 5.5
     - 5.6
 
+env:
+    - SYMFONY_VERSION=2.3.*
+    - SYMFONY_VERSION=2.4.*
+    - SYMFONY_VERSION=2.5.*
+    - SYMFONY_VERSION=2.6.*
+    - SYMFONY_VERSION=2.7.*
+    - SYMFONY_VERSION=2.8.*
+
 services:
     - mongodb
 
 before_script:
     - echo "extension=mongo.so" >> ~/.phpenv/versions/$(phpenv version-name)/etc/php.ini
     - curl -s http://getcomposer.org/installer | php
+    - composer require symfony/symfony:${SYMFONY_VERSION}
     - php -d memory_limit=-1 composer.phar install
     - php Tests/app/console generate:rest:controller -t --controller TestTestBundle:MyCar --entity TestTestBundle:Car
     - php Tests/app/console generate:rest:controller -t --controller TestTestBundle:MyCarOwner --entity TestTestBundle:CarOwner