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

@@ -33,8 +33,12 @@ matrix:
         - SYMFONY_VERSION='2.7.*@dev'
         - FRAMEWORK_EXTRA_VERSION='~3.0'
 
+before_install:
+  apt-get install -qq bc
+
 before_script:
   - sh -c 'if [ "$SYMFONY_VERSION" != "" ]; then composer require --dev --no-update symfony/symfony=$SYMFONY_VERSION; fi;'
+  - sh -c 'FLAWED_DEPRECATIONS=`echo "$SYMFONY_VERSION >= 2.7"|bc`; if [ $FLAWED_DEPRECATIONS = 1 ]; then echo "error_reporting = E_ALL & ~E_DEPRECATED" >> ~/.phpenv/versions/$(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