Symfony 2.7 calls its own deprecated methods, raising warnings that break the build if we treat deprecated as an error

Author: dbu

.travis.yml

@@ -35,6 +35,8 @@ matrix:
 
 before_script:
   - sh -c 'if [ "$SYMFONY_VERSION" != "" ]; then composer require --dev --no-update symfony/symfony=$SYMFONY_VERSION; fi;'
+    # E_ALL & ~E_DEPRECATED is 24575
+  - sh -c 'if [ "$SYMFONY_VERSION" >= "2.7" ]; then echo "error_reporting = 24575" >> ~/.phpenv/versions/$(phpenv version-name)/etc/conf.d/travis.ini; fi;'
   - sh -c 'if [ "$FRAMEWORK_EXTRA_VERSION" != "" ]; then composer require --dev --no-update sensio/framework-extra-bundle=$FRAMEWORK_EXTRA_VERSION; fi;'
   - composer install
   - sudo apt-get install python-sphinx